Key term
AQA GCSE Physics 8463
Atomic Structure
Topic overviewThe structure of an atomMass number, atomic number and isotopesFrom the plum pudding model to the nuclear modelChadwick, the neutron, and comparing the modelsRadioactive decay and nuclear radiationNuclear equationsHalf-lives and the random nature of radioactive decayRadioactive contaminationBackground radiationUses of nuclear radiation, and how half-life affects hazardNuclear fission and nuclear fusion
Electricity
Topic overviewCircuit symbols, electrical charge and currentCurrent, resistance and potential differenceOhmic conductors, filament lamps, diodes and thermistorsLight-dependent resistors, and investigating resistanceCurrent and potential difference in series and parallelConstructing circuits, and calculating in series circuitsDirect and alternating potential difference, and mains electricityPower and efficiencyAppliances, and the energy transferred by electrical workPower, and the power ratings of domestic appliancesThe National GridStatic chargeElectric fields
Energy
Forces
Topic overviewScalars, vectors, forces and the resultant forceGravityWork done and energy transferStretching, compressing, and the spring constantLinear and non-linear extension, and work done on a springMoments, levers and gearsPressure at a surface, and the equation p = F over APressure in a column of liquid, upthrust and floatingAtmospheric pressureResolving forces and free body diagramsDistance, displacement and speedThe speed of sound, and the distance-speed-time equationVelocity and the distance-time relationshipAcceleration, deceleration and velocity-time graphsArea under a velocity-time graph, and the uniform acceleration equationNewton's First LawNewton's Second and Third LawsStopping distance and reaction timeFactors affecting braking distanceBraking force, deceleration and the dangers of stopping quicklyMomentum and its conservationChanges in momentum
Magnetism and Electromagnetism
Topic overviewPoles of a magnetMagnetic fields around a magnetThe compass, and plotting a magnetic fieldElectromagnetismFleming's left-hand rule, motors and loudspeakersInduced potentialThe generator effect, alternators, dynamos and microphonesThe structure of a transformer and the turns ratioTransformer power, and using the transformer equations
Particle Model of Matter
Space Physics
Waves
Topic overviewTransverse and longitudinal waves, and the wave equationWave properties, and refraction at a boundaryReflection of wavesSound wavesUltrasound, echo sounding and seismic wavesTypes and uses of electromagnetic wavesRadio waves, and the hazards of ultraviolet, X-rays and gamma raysLensesVisible lightEmission and absorption of infrared radiation, and black bodies
Waves
Visible light
- 3 things to know
- Paper 2
Overview
The wavelength and frequency of each colour of visible light, specular and diffuse reflection, how colour filters work, why opaque objects look coloured, white or black, objects seen under coloured light, transparent and translucent materials, and explaining the colours of leaves, filtered objects and shirts under coloured lamps.
What you need to know
Answer each one before you reveal it.
Your recallNot started
Key term
What is different about each colour within the visible light spectrum?
Key term
How does the frequency of blue light compare with the frequency of red light?
Questions from this subtopic
Each one with the model answer underneath.
- 1
What is different about each colour within the visible light spectrum?
Model answer
Each colour has its own narrow band of wavelength and frequency.
- 2
How does the frequency of blue light compare with the frequency of red light?
Model answer
Blue light has a higher frequency, and so a shorter wavelength, than red light.
- 3
What is specular reflection?
Model answer
Reflection from a smooth surface, where the light is reflected in a single direction.
- 4
What is diffuse reflection?
Model answer
Reflection from a rough surface, which scatters the light in many directions.
- 5
Why can you see your face in a mirror but not in a sheet of paper?
Model answer
The smooth mirror reflects the light in a single direction, while the rough paper scatters it.
- 6
Why does a wet road look shinier at night than a dry one?
Model answer
The film of water makes the surface smooth, so more light is reflected in a single direction instead of being scattered.
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