England · Physics · Area

Waves

Measuring mechanical waves · Interfaces and sound · Electromagnetic waves · Optics and radiation

  • 4units
  • 14lectures planned

Scope and route

Filters show lectures with relevant core content. Mixed lectures retain clearly labelled Higher/separate extensions; those extensions are not required on other routes. Difficulty is a design rating, not a GCSE grade.

Shared
Physics and Trilogy, both tiers unless a Higher branch is named.
Separate Physics
Outside the Trilogy physics requirements.
Higher
Higher-only objectives, examples or assessments are labelled.
Ratings
Difficulty 1–4 and duration are proposed design choices; mastery means independently meeting exit criteria.

Waves

Area page →

WA-U1 · Measuring mechanical waves

Unit page →

WA-01 · WA-U1 · Planned

Waves transfer energy

  • ScopeShared
  • Difficulty1 / 4 · proposed
  • Time25–30 min · estimated
  • StatusPlanned

Learning objectives

Distinguish transverse/longitudinal waves; use a tracer to show energy propagation without bulk matter transport.

8463 §§4.6.1.1 / 8464 §§6.6.1.1

DfE single-science pp.37–39 / Combined pp.32–33. Evidence checked 30 September–1 October 2026. Skills: WS1.2,2.2,3.6; MS5b.

Needs firstEN-02; PM-01

Explanation

A travelling disturbance can carry energy while particles oscillate about their positions. Transverse motion is perpendicular to propagation; longitudinal motion is parallel, producing compressions and rarefactions. A water-surface model is a simplified transverse description, not a claim about every actual particle trajectory.

Concepts, equations and units: Oscillation perpendicular/parallel to propagation; compressions/rarefactions; water surface is GCSE transverse approximation.

Prediction, demonstration and game exercise

Predict, observe, explain

Predict a floating marker trajectory and a slinky disturbance; contrast marker motion with travelling pattern.

Planned learner game exercise

Launch pulses through rope, water and air models; track a marked particle and select the direction relationship.

Independent practice

Draw both wave types and explain energy transport with stationary-average marker data.

Original practice example · Shared

An air sound wave travels right. In which direction do air particles oscillate?

Show working and model answer

Working / reasoning

Longitudinal particle oscillation is parallel to the travel direction.

Answer

Back and forth along the left–right direction, without bulk travel with the wave.

Exit check and success criteria

Both classifications correct and explanation distinguishes oscillating particles from propagation.

During practice, compare the prediction with evidence and give an error-specific prompt. The exit item uses a fresh context or fresh values, answered independently.

Misconceptions, practical links and mastery

Check these misconceptions

Particles travel the whole distance with the wave; all waves need matter; water particles move only vertically in reality.

Practical preparation

RP-P8/RP-C20 preparation; rope/slinky/ripple observation, AT4.

Virtual preparation and revision only. Required hands-on activities and school records remain separate.

Proposed mastery

0: not yet evidenced. 1: supported. 2: independent exit criteria met. 3: successful changed-context transfer. Advance at 2; revisit with fresh retrieval. These are not GCSE grades.

Full lecture page →

WA-02 · WA-U1 · Planned

Wave measurements and equations

  • ScopeShared
  • Difficulty2 / 4 · proposed
  • Time30–35 min · estimated
  • StatusPlanned

Learning objectives

Measure amplitude, wavelength, period and frequency; calculate wave speed.

8463 §§4.6.1.2 / 8464 §§6.6.1.2

DfE single-science pp.37–39 / Combined pp.32–33. Evidence checked 30 September–1 October 2026. Skills: WS4.2,4.5; MS1c,3b,3c,4a.

Needs firstWA-01; P0 rates

Explanation

Wavelength is separation between equivalent points on successive waves, while period is time for one cycle. Frequency counts cycles per second. Keep time traces distinct from spatial snapshots; their horizontal axes have different units.

Concepts, equations and units: v=fλ; T=1/f; v m/s, f Hz, λ m, T s; amplitude m; time trace versus spatial trace.

Prediction, demonstration and game exercise

Predict, observe, explain

Compare snapshots and time traces; count cycles over several periods and measure several wavelengths.

Planned learner game exercise

Tune a wave maker to a target wavelength/speed; choose the correct measurement axes.

Independent practice

Four equation/conversion questions and diagram labels; distinguish wavelength from crest height.

Original practice example · Shared

A wave has f = 5 Hz and λ = 0.40 m. Find speed and period.

Show working and model answer

Working / reasoning

v = fλ = 5 × 0.40 = 2 m/s; T = 1/f = 1/5.

Answer

2.0 m/s and 0.20 s.

Exit check and success criteria

Three calculations correct plus correct amplitude/wavelength labels.

During practice, compare the prediction with evidence and give an error-specific prompt. The exit item uses a fresh context or fresh values, answered independently.

Misconceptions, practical links and mastery

Check these misconceptions

Frequency equals wave speed; wavelength measured from crest to trough; amplitude is peak-to-peak.

Practical preparation

RP-P8/RP-C20 preparation; AT1,4.

Virtual preparation and revision only. Required hands-on activities and school records remain separate.

Proposed mastery

0: not yet evidenced. 1: supported. 2: independent exit criteria met. 3: successful changed-context transfer. Advance at 2; revisit with fresh retrieval. These are not GCSE grades.

Full lecture page →

WA-03 · WA-U1 · Planned

Wave-speed investigations

  • ScopeShared
  • Difficulty3 / 4 · proposed
  • Time35–40 min · estimated
  • StatusPlanned

Learning objectives

Choose suitable apparatus and methods for ripple-tank and solid waves; explain a method for sound speed in air.

8463 §§4.6.1.2;8.2.8 / 8464 §§6.6.1.2;10.2.20

DfE single-science pp.37–39 / Combined pp.32–33. Evidence checked 30 September–1 October 2026. Skills: WS2.3–2.7,3.1,3.5; MS2a,2b,3c.

Needs firstWA-02

Explanation

Measure several wavelengths or cycles to reduce relative reading uncertainty, then divide appropriately. A ripple tank and a vibrating solid need suitable separate methods. For an echo, the measured time includes travel to the reflector and back.

Concepts, equations and units: v=fλ or distance/time; m/s,Hz,m,s; multiple cycles/wavelengths reduce relative measurement error.

Prediction, demonstration and game exercise

Predict, observe, explain

Demonstrate ripple tank and vibrating string/solid apparatus plus sound timing/echo or microphone method.

Planned learner game exercise

Measure frequency/wavelength/speed in both required apparatus types; choose timing separation for sound.

Independent practice

Analyse repeat readings, compare methods and quantify one uncertainty; echo distance requires two-way path.

Original practice example · Shared

An echo returns in 0.40 s from a wall 66 m away. Find sound speed.

Show working and model answer

Working / reasoning

Total distance = 2 × 66 = 132 m; v = 132/0.40.

Answer

330 m/s.

Exit check and success criteria

Both RP apparatus contexts addressed with valid methods/data and a justified sound-speed method.

During practice, compare the prediction with evidence and give an error-specific prompt. The exit item uses a fresh context or fresh values, answered independently.

Misconceptions, practical links and mastery

Check these misconceptions

Only a ripple tank fulfils the RP; frame rate is actual wave frequency; echo travels only one way.

Practical preparation

RP-P8/RP-C20: waves in ripple tank AND solid. Sound-speed method is additional specified theory/practical knowledge; AT4.

Virtual preparation and revision only. Required hands-on activities and school records remain separate.

Proposed mastery

0: not yet evidenced. 1: supported. 2: independent exit criteria met. 3: successful changed-context transfer. Advance at 2; revisit with fresh retrieval. These are not GCSE grades.

Full lecture page →

WA-U2 · Interfaces and sound

Unit page →

WA-04 · WA-U2 · Planned

Reflection and material interfaces

  • ScopeSeparate Physics
  • Difficulty2 / 4 · proposed
  • Time30–35 min · estimated
  • StatusPlanned

Learning objectives

Draw reflection rays and normal; distinguish reflected, transmitted and absorbed energy.

8463 §§4.6.1.3 / No Trilogy counterpart

DfE single-science pp.37–39 / Combined pp.32–33. Evidence checked 30 September–1 October 2026. Skills: WS1.2,2.6; MS5a,5c.

Needs firstWA-01,WA-02

Explanation

The normal is perpendicular to the surface at the point of incidence. Reflection angles are measured from that normal. At a material boundary, incident energy may be divided between reflection, transmission and absorption rather than all reflected.

Concepts, equations and units: Angles from normal in degrees; incidence angle=reflection angle; ray and wavefront representations differ.

Prediction, demonstration and game exercise

Predict, observe, explain

Send waves to a boundary and compare smooth/rough surfaces; annotate energy partitions.

Planned learner game exercise

Orient mirrors to send a beam to a receiver; compare reflective and absorbing materials.

Independent practice

Two ray-diagram problems and an interface explanation; record angles in a table.

Original practice example · Separate Physics

A ray arrives at 35° to the normal of a mirror. State its reflection angle.

Show working and model answer

Working / reasoning

For reflection, angle of incidence equals angle of reflection, both measured from the normal.

Answer

35° to the normal.

Exit check and success criteria

Both ray constructions within 2° target tolerance and all three outcomes distinguished.

During practice, compare the prediction with evidence and give an error-specific prompt. The exit item uses a fresh context or fresh values, answered independently.

Misconceptions, practical links and mastery

Check these misconceptions

Angles measured from surface; every boundary reflects all incident energy; diffuse reflection breaks reflection law.

Practical preparation

RP-P9 reflection part; AT4,8.

Virtual preparation and revision only. Required hands-on activities and school records remain separate.

Proposed mastery

0: not yet evidenced. 1: supported. 2: independent exit criteria met. 3: successful changed-context transfer. Advance at 2; revisit with fresh retrieval. These are not GCSE grades.

Full lecture page →

WA-05 · WA-U2 · Planned

Refraction and wavefronts

  • ScopeShared + Higher explanation; Separate Physics practical
  • Difficulty3 / 4 · proposed
  • Time30–35 min · estimated
  • StatusPlanned

Learning objectives

Draw refraction rays at a boundary; H: explain bending using speed change and wavefronts.

8463 §§4.6.2.2;8.2.9 / 8464 §§6.6.2.2

DfE single-science pp.37–39 / Combined pp.32–33. Evidence checked 30 September–1 October 2026. Skills: WS1.2,2.6; MS5a,5b.

Needs firstWA-02; WA-04 for P

Explanation

A refracted ray changes direction when it crosses obliquely into a medium with different wave speed. Toward-normal bending occurs on slowing; away-normal on speeding. Frequency remains set by the source. Higher explanation relates the turning wavefront to different speeds at the boundary.

Concepts, equations and units: Ray angles from normal; frequency unchanged across boundary; v=fλ; speed/wavelength change; no Snell-law calculation required.

Prediction, demonstration and game exercise

Predict, observe, explain

Predict air-to-glass bending, including normal incidence; H: turn wavefronts as speed changes.

Planned learner game exercise

Place blocks/prisms and trace beams; H: select a consistent speed/wavelength wavefront model.

Independent practice

Two ray diagrams; H explanation; P compare reflection/refraction measurements from different substances.

Original practice example · Shared

Light enters slower glass from air at an oblique angle. Describe bending and the frequency change.

Show working and model answer

Working / reasoning

Slower propagation makes the ray bend toward the normal; frequency remains the same while wavelength decreases.

Answer

Toward normal; unchanged frequency.

Exit check and success criteria

Correct toward/away-normal rays for supplied speed changes; H preserves frequency and explains bending.

During practice, compare the prediction with evidence and give an error-specific prompt. The exit item uses a fresh context or fresh values, answered independently.

Misconceptions, practical links and mastery

Check these misconceptions

All refraction bends toward normal; frequency changes at boundary; refraction absent from Combined Science.

Practical preparation

RP-P9 refraction part only. Shared refraction theory has no equivalent Trilogy optics RP; AT4,8 for P.

Virtual preparation and revision only. Required hands-on activities and school records remain separate.

Proposed mastery

0: not yet evidenced. 1: supported. 2: independent exit criteria met. 3: successful changed-context transfer. Advance at 2; revisit with fresh retrieval. These are not GCSE grades.

Full lecture page →

WA-06 · WA-U2 · Planned

Sound, hearing and transmission

  • ScopeSeparate Physics + Separate Physics Higher hearing
  • Difficulty3 / 4 · proposed
  • Time30–35 min · estimated
  • StatusPlanned

Learning objectives

Relate sound speed, frequency and wavelength across media; H: explain sound-to-solid vibration and hearing limits.

8463 §§4.6.1.2,4.6.1.4 / No Trilogy counterpart

DfE single-science pp.37–39 / Combined pp.32–33. Evidence checked 30 September–1 October 2026. Skills: WS1.2,3.6; MS1c,3c.

Needs firstWA-01–03

Explanation

Sound needs a material whose disturbances can propagate. At a boundary, source frequency is preserved but speed and wavelength can change. On the separate Higher route, hearing is explained by sound causing vibrations in solids in the ear over a limited frequency range.

Concepts, equations and units: v=fλ; m/s,Hz,m; frequency fixed by source; H normal human hearing about 20 Hz–20 kHz.

Prediction, demonstration and game exercise

Predict, observe, explain

Transmit a model tone into another medium; H: show eardrum vibration within a limited response range.

Planned learner game exercise

Match source-frequency and wavelength cards in two media; H: classify audible/ultrasound tones using numbers, not real loud audio.

Independent practice

Two wavelength comparisons; H explain ear response and why sound needs matter.

Original practice example · Separate Physics

A 1000 Hz sound wave travels at 1500 m/s in a supplied medium. Find wavelength.

Show working and model answer

Working / reasoning

λ = v/f = 1500/1000.

Answer

1.5 m.

Exit check and success criteria

Frequency preserved with correct wavelength changes; H correct hearing range and vibration chain.

During practice, compare the prediction with evidence and give an error-specific prompt. The exit item uses a fresh context or fresh values, answered independently.

Misconceptions, practical links and mastery

Check these misconceptions

Pitch always changes between media; humans hear every frequency; animation scale is a real ear motion measurement.

Practical preparation

Optional sound transmission demonstration; AT4,8; no required practical specific to hearing.

Virtual preparation and revision only. Required hands-on activities and school records remain separate.

Proposed mastery

0: not yet evidenced. 1: supported. 2: independent exit criteria met. 3: successful changed-context transfer. Advance at 2; revisit with fresh retrieval. These are not GCSE grades.

Full lecture page →

WA-07 · WA-U2 · Planned

Ultrasound, sonar and seismic evidence

  • ScopeSeparate Physics Higher
  • Difficulty4 / 4 · proposed
  • Time35–40 min · estimated
  • StatusPlanned

Learning objectives

Explain reflection-based hidden-structure imaging; use P/S-wave evidence for Earth’s structure.

8463 §§4.6.1.5 / No Trilogy counterpart

DfE single-science pp.37–39 / Combined pp.32–33. Evidence checked 30 September–1 October 2026. Skills: WS1.1,1.2,1.4,3.6; MS3c,4a.

Needs firstWA-06

Explanation

Reflections from internal boundaries can locate hidden structures using round-trip travel time. P and S seismic waves give different evidence: P waves traverse solids and liquids, while S waves cannot traverse liquids. Inferences depend on combining observations, not simply drawing a cutaway.

Concepts, equations and units: Round-trip distance=vt/2 as application of speed relation; ultrasound above human hearing; P longitudinal, S transverse; S cannot traverse liquid.

Prediction, demonstration and game exercise

Predict, observe, explain

Compare boundary echoes and seismic paths; separate observation from inference.

Planned learner game exercise

Locate a hidden flaw or seabed from echo times; choose an Earth model consistent with a supplied seismic dataset.

Independent practice

Two echo-distance calculations and a written P/S evidence argument.

Original practice example · Separate Physics Higher

A pulse travels at 1500 m/s and returns after 0.020 s. Find reflector distance.

Show working and model answer

Working / reasoning

One-way distance = vt/2 = 1500 × 0.020/2.

Answer

15 m.

Exit check and success criteria

Correct round-trip factor and inference consistent with both wave types; uncertainty acknowledged.

During practice, compare the prediction with evidence and give an error-specific prompt. The exit item uses a fresh context or fresh values, answered independently.

Misconceptions, practical links and mastery

Check these misconceptions

Ultrasound is electromagnetic; S-waves travel through liquids; images are photographs directly seen inside objects.

Practical preparation

Optional echo/supplied-data analysis; no medical diagnosis exercise or RP.

Virtual preparation and revision only. Required hands-on activities and school records remain separate.

Proposed mastery

0: not yet evidenced. 1: supported. 2: independent exit criteria met. 3: successful changed-context transfer. Advance at 2; revisit with fresh retrieval. These are not GCSE grades.

Full lecture page →

WA-U3 · Electromagnetic waves

Unit page →

WA-08 · WA-U3 · Planned

Electromagnetic spectrum

  • ScopeShared
  • Difficulty2 / 4 · proposed
  • Time30–35 min · estimated
  • StatusPlanned

Learning objectives

Order EM groups by wavelength/frequency; explain energy transfer and common vacuum speed.

8463 §§4.6.2.1 / 8464 §§6.6.2.1

DfE single-science pp.37–39 / Combined pp.32–33. Evidence checked 30 September–1 October 2026. Skills: WS1.2,4.4; MS1b,3c.

Needs firstWA-02,EN-02

Explanation

The electromagnetic spectrum is continuous; named bands group wavelengths and frequencies. All groups travel at the same speed in a vacuum, so higher frequency corresponds to shorter wavelength there. Visible colours label only the band eyes can detect.

Concepts, equations and units: Radio, microwave, IR, visible red→violet, UV, X-ray, gamma; transverse; v=fλ; vacuum c≈3×10⁸ m/s supplied for calculation.

Prediction, demonstration and game exercise

Predict, observe, explain

Sweep an annotated spectrum and show common vacuum travel time; label visible as a small range.

Planned learner game exercise

Sort spectrum bands and match source-to-absorber transfer cards; compare waves on the same distance.

Independent practice

Three frequency/wavelength calculations with standard form; identify inverse trend.

Original practice example · Shared

An EM wave has frequency 1.0 × 10⁸ Hz. Use c = 3.0 × 10⁸ m/s. Find wavelength.

Show working and model answer

Working / reasoning

λ = c/f = (3.0 × 10⁸)/(1.0 × 10⁸).

Answer

3.0 m.

Exit check and success criteria

All seven bands ordered and two calculations correct.

During practice, compare the prediction with evidence and give an error-specific prompt. The exit item uses a fresh context or fresh values, answered independently.

Misconceptions, practical links and mastery

Check these misconceptions

Gamma travels faster than radio in vacuum; EM waves require air; coloured spectrum labels are actual colours of invisible radiation.

Practical preparation

No RP; cross-link WA-11 infrared.

Virtual preparation and revision only. Required hands-on activities and school records remain separate.

Proposed mastery

0: not yet evidenced. 1: supported. 2: independent exit criteria met. 3: successful changed-context transfer. Advance at 2; revisit with fresh retrieval. These are not GCSE grades.

Full lecture page →

WA-09 · WA-U3 · Planned

Applications, hazards and dose evidence

  • ScopeShared + Higher suitability explanations
  • Difficulty3 / 4 · proposed
  • Time35–40 min · estimated
  • StatusPlanned

Learning objectives

Match every specified EM group to applications; evaluate supplied exposure data; H: explain suitability.

8463 §§4.6.2.3–4.6.2.4 / 8464 §§6.6.2.3–6.6.2.4

DfE single-science pp.37–39 / Combined pp.32–33. Evidence checked 30 September–1 October 2026. Skills: WS1.4,1.5,3.5; MS1c,2c.

Needs firstWA-08; AT-03 for nuclear link

Explanation

Applications exploit how waves interact with matter. Exposure risk depends on radiation type and dose; ionising radiation can damage cells. A given dataset supports a specific comparison, not a universal safety conclusion or a clinical recommendation.

Concepts, equations and units: Radio broadcast; microwave communications/cooking; IR heaters/cameras; visible fibre optics; UV lamps/tanning; X/gamma imaging/treatment; Sv/mSv supplied units, not recall requirement.

Prediction, demonstration and game exercise

Predict, observe, explain

Compare penetration/absorption in schematic materials and model exposure data; identify gamma nuclear origin.

Planned learner game exercise

Design a communications/imaging toolkit and reject unsafe exposure choices using provided evidence.

Independent practice

Three risk-data questions and two application explanations; H links physical property to use.

Original practice example · Shared

A supplied exposure table lists 0.002 Sv. Convert it to mSv.

Show working and model answer

Working / reasoning

1 Sv = 1000 mSv; 0.002 × 1000.

Answer

2 mSv. The dose unit is supplied for interpretation, not a recall requirement here.

Exit check and success criteria

At least one accurate use per band, consistent dose conversion and evidence-based risk comparison.

During practice, compare the prediction with evidence and give an error-specific prompt. The exit item uses a fresh context or fresh values, answered independently.

Misconceptions, practical links and mastery

Check these misconceptions

All radiation is radioactive; non-ionising means harmless at every dose; dose and activity are the same quantity.

Practical preparation

Source-based risk analysis; no learner exposure experiments.

Virtual preparation and revision only. Required hands-on activities and school records remain separate.

Proposed mastery

0: not yet evidenced. 1: supported. 2: independent exit criteria met. 3: successful changed-context transfer. Advance at 2; revisit with fresh retrieval. These are not GCSE grades.

Full lecture page →

WA-10 · WA-U3 · Planned

Radio production, absorption and selective interactions

  • ScopeShared Higher
  • Difficulty3 / 4 · proposed
  • Time30–35 min · estimated
  • StatusPlanned

Learning objectives

Explain oscillating circuits producing radio waves and induced oscillations on reception; compare wavelength-dependent material interactions.

8463 §§4.6.2.2–4.6.2.3 / 8464 §§6.6.2.2–6.6.2.3

DfE single-science pp.37–39 / Combined pp.32–33. Evidence checked 30 September–1 October 2026. Skills: WS1.2,1.4,3.5; MS4a.

Needs firstWA-08,EL-07

Explanation

Oscillating electrical circuits can emit radio waves. When a receiving circuit absorbs a radio wave, it can develop electrical oscillations at the wave’s frequency. Material interactions depend on wavelength, so a route transparent to one band may absorb another.

Concepts, equations and units: AC frequency Hz; transmitter/receiver frequencies correspond; materials selectively absorb/transmit/reflect/refract; no antenna engineering formulas.

Prediction, demonstration and game exercise

Predict, observe, explain

Animate an oscillating circuit and receiving current at the same frequency; show model material response.

Planned learner game exercise

Tune transmitter/receiver frequency and choose a material route based on supplied response graphs.

Independent practice

Explain a reception failure and interpret two transmission/absorption curves.

Original practice example · Shared Higher

A radio wave of 2 MHz is received in the model circuit. What is the induced oscillation frequency?

Show working and model answer

Working / reasoning

The absorbing circuit’s oscillations correspond to the radio-wave frequency in this model.

Answer

2 MHz.

Exit check and success criteria

Frequency correspondence correct and explanation uses wavelength-dependent interaction evidence.

During practice, compare the prediction with evidence and give an error-specific prompt. The exit item uses a fresh context or fresh values, answered independently.

Misconceptions, practical links and mastery

Check these misconceptions

Radio waves transport current through empty space; all materials behave identically for every wavelength.

Practical preparation

Optional teacher demonstration/supplied circuit signals; not an RP.

Virtual preparation and revision only. Required hands-on activities and school records remain separate.

Proposed mastery

0: not yet evidenced. 1: supported. 2: independent exit criteria met. 3: successful changed-context transfer. Advance at 2; revisit with fresh retrieval. These are not GCSE grades.

Full lecture page →

WA-11 · WA-U3 · Planned

Infrared surfaces investigation

  • ScopeShared
  • Difficulty3 / 4 · proposed
  • Time35–40 min · estimated
  • StatusPlanned

Learning objectives

Plan comparisons of absorption/emission for different surfaces; control geometry and temperature.

8463 §§4.6.2.2;8.2.10 / 8464 §§6.6.2.2;10.2.21

DfE single-science pp.37–39 / Combined pp.32–33. Evidence checked 30 September–1 October 2026. Skills: WS2.1–2.7,3.4,3.7; MS2b,2c,4c.

Needs firstEN-09,WA-08

Explanation

A surface comparison needs equal geometry, distance and relevant starting temperatures. Good infrared absorbers are also good emitters. Compare like measurements and state whether the detector measures radiation directly or whether temperature change provides indirect evidence.

Concepts, equations and units: Infrared transfer; temperature °C, time s, detector signal in labelled units; dark matt versus light shiny surfaces; no Stefan–Boltzmann equation.

Prediction, demonstration and game exercise

Predict, observe, explain

Compare model detector readings from equally hot surfaces and warming rates under equal irradiation.

Planned learner game exercise

Select detector distance, initial temperature, surface finish and repeats; collect both absorption/emission evidence.

Independent practice

Plot results with uncertainty; distinguish temperature readings from direct radiation measurements.

Original practice example · Shared

Equally hot surfaces at the same distance give repeated detector signals: matt A = 18, 19, 20; shiny B = 6, 7, 8 arbitrary units. Compare means.

Show working and model answer

Working / reasoning

Mean A = 57/3 = 19; mean B = 21/3 = 7. A’s emitted detector signal is larger under the stated controls.

Answer

19 and 7 units; A emits a larger measured IR signal in this setup.

Exit check and success criteria

Controlled comparison with labelled data and a conclusion limited to the tested surfaces.

During practice, compare the prediction with evidence and give an error-specific prompt. The exit item uses a fresh context or fresh values, answered independently.

Misconceptions, practical links and mastery

Check these misconceptions

Black surfaces only absorb and never emit; visible colour alone determines every radiation property.

Practical preparation

RP-P10/RP-C21; AT1,4.

Virtual preparation and revision only. Required hands-on activities and school records remain separate.

Proposed mastery

0: not yet evidenced. 1: supported. 2: independent exit criteria met. 3: successful changed-context transfer. Advance at 2; revisit with fresh retrieval. These are not GCSE grades.

Full lecture page →

WA-U4 · Optics and radiation

Unit page →

WA-12 · WA-U4 · Planned

Lenses and image formation

  • ScopeSeparate Physics
  • Difficulty3 / 4 · proposed
  • Time35–40 min · estimated
  • StatusPlanned

Learning objectives

Construct convex/concave lens ray diagrams; distinguish real/virtual images; calculate magnification.

8463 §§4.6.2.5 / No Trilogy counterpart

DfE single-science pp.37–39 / Combined pp.32–33. Evidence checked 30 September–1 October 2026. Skills: WS1.2; MS3b,3c,5a,5c.

Needs firstWA-05

Explanation

A lens changes ray direction through refraction. Convex lenses can form real or virtual images depending on object position; a concave lens forms a virtual image. Magnification is a ratio, so object and image heights use the same units and the answer has no unit.

Concepts, equations and units: Magnification=image height/object height, no unit; both heights same units; principal focus, focal length m; convex real or virtual, concave virtual.

Prediction, demonstration and game exercise

Predict, observe, explain

Move an object through focal positions and show screen capture versus virtual viewing.

Planned learner game exercise

Position lenses to make a specified image; place principal rays and predict size/orientation before reveal.

Independent practice

Three ray-diagram cases and two magnification calculations.

Original practice example · Separate Physics

An image is 30 mm high and its object is 10 mm high. Find magnification.

Show working and model answer

Working / reasoning

Magnification = image height/object height = 30/10.

Answer

3, with no unit.

Exit check and success criteria

Correct image type/orientation for two cases and both ratios correct without units.

During practice, compare the prediction with evidence and give an error-specific prompt. The exit item uses a fresh context or fresh values, answered independently.

Misconceptions, practical links and mastery

Check these misconceptions

All lens images can be caught on a screen; magnification is measured in cm; ray lines are physical tracks.

Practical preparation

Optional lens/magnification investigation, AT4,8; not an additional RP.

Virtual preparation and revision only. Required hands-on activities and school records remain separate.

Proposed mastery

0: not yet evidenced. 1: supported. 2: independent exit criteria met. 3: successful changed-context transfer. Advance at 2; revisit with fresh retrieval. These are not GCSE grades.

Full lecture page →

WA-13 · WA-U4 · Planned

Visible colour, filters and reflection

  • ScopeSeparate Physics
  • Difficulty2 / 4 · proposed
  • Time30–35 min · estimated
  • StatusPlanned

Learning objectives

Explain opaque colour and filters through selective absorption/reflection/transmission; distinguish specular/diffuse reflection and transparent/translucent.

8463 §§4.6.2.6 / No Trilogy counterpart

DfE single-science pp.37–39 / Combined pp.32–33. Evidence checked 30 September–1 October 2026. Skills: WS1.2,3.6; MS5b.

Needs firstWA-08,WA-04

Explanation

An opaque object’s appearance depends on incident wavelengths and which it reflects. Filters selectively transmit and absorb; they do not manufacture missing light. Rough surfaces reflect at many local orientations, producing diffuse reflection while each local ray obeys the reflection rule.

Concepts, equations and units: Visible wavelength bands; no new equation; source spectrum matters.

Prediction, demonstration and game exercise

Predict, observe, explain

Illuminate coloured objects with white and single-colour light; show rough/smooth reflected rays.

Planned learner game exercise

Select light/filter combinations to reveal a coded object; predict black appearances when available light is absorbed.

Independent practice

Explain three source–filter–object cases and draw smooth/rough ray patterns.

Original practice example · Separate Physics

An ideal red-reflecting object is lit only by blue light, which it absorbs. How does it appear?

Show working and model answer

Working / reasoning

No red light is incident to reflect, and the supplied blue light is absorbed.

Answer

Black or very dark in the ideal model.

Exit check and success criteria

Two colour predictions correct with wavelength explanation and both reflection patterns consistent.

During practice, compare the prediction with evidence and give an error-specific prompt. The exit item uses a fresh context or fresh values, answered independently.

Misconceptions, practical links and mastery

Check these misconceptions

A red object always looks red; filters add their colour; diffuse rays violate reflection law.

Practical preparation

Optional colour/filter investigation, AT4,8.

Virtual preparation and revision only. Required hands-on activities and school records remain separate.

Proposed mastery

0: not yet evidenced. 1: supported. 2: independent exit criteria met. 3: successful changed-context transfer. Advance at 2; revisit with fresh retrieval. These are not GCSE grades.

Full lecture page →

WA-14 · WA-U4 · Planned

Black bodies and radiation balance

  • ScopeSeparate Physics + Separate Physics Higher balance
  • Difficulty3 (H 4) / 4 · proposed
  • Time35–40 min · estimated
  • StatusPlanned

Learning objectives

Explain emission at all temperatures and temperature-dependent spectrum; H: relate temperature change to absorbed/emitted power, including Earth.

8463 §§4.6.3.1–4.6.3.2 / No Trilogy counterpart

DfE single-science pp.37–39 / Combined pp.32–33. Evidence checked 30 September–1 October 2026. Skills: WS1.2,1.3,3.5; MS4a.

Needs firstWA-11,EN-03

Explanation

Every object emits radiation, and emission distribution changes with temperature. A perfect black body absorbs all incident radiation and is the best emitter. The Higher energy-balance branch distinguishes absorbed power from incident/reflected power and links net absorption to temperature change.

Concepts, equations and units: Perfect black body absorbs all incident radiation and is best emitter; spectrum intensity/wavelength vs temperature; H power balance W.

Prediction, demonstration and game exercise

Predict, observe, explain

Compare labelled model spectra; H vary absorption/reflection/emission of Earth–atmosphere model.

Planned learner game exercise

Choose surfaces for a satellite; H adjust incoming/absorbed/emitted power and predict warming/cooling/equilibrium.

Independent practice

Interpret two spectra; H annotate an Earth radiation diagram and identify a model limitation.

Original practice example · Separate Physics Higher

A body absorbs 120 W and emits 100 W, with no other transfers in the stated model. Predict its temperature change.

Show working and model answer

Working / reasoning

Net rate into the body = 120 − 100 = 20 W; internal energy rises.

Answer

It warms; net absorbed power is 20 W.

Exit check and success criteria

Correct hotter-spectrum comparison; H temperature change consistent with net absorbed power and equilibrium rates equal.

During practice, compare the prediction with evidence and give an error-specific prompt. The exit item uses a fresh context or fresh values, answered independently.

Misconceptions, practical links and mastery

Check these misconceptions

Cold objects do not radiate; constant temperature means no transfer; greenhouse model proves exact future temperature.

Practical preparation

RP-P10 data revisit; black-body theory and H balance extend beyond shared RP.

Virtual preparation and revision only. Required hands-on activities and school records remain separate.

Proposed mastery

0: not yet evidenced. 1: supported. 2: independent exit criteria met. 3: successful changed-context transfer. Advance at 2; revisit with fresh retrieval. These are not GCSE grades.

Full lecture page →

Sources and full programme

Sources checked 30 September–1 October 2026. Specifications govern content; textbooks supplement it. England has no single prescribed Physics course book. The full planning document includes sourced comparisons of Collins separate Physics and Trilogy books, Hodder/Hachette Physics and Oxford Physics listings, with access/approval limitations.

Download the complete Markdown programme and coverage matrix

A subsection map is proposed coverage. Clause-level educator review, item moderation, model validation and hands-on provision remain release gates. No all-board alignment or exam-board endorsement is claimed.