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 AAtmospheric pressureDistance, 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 quickly
Magnetism and Electromagnetism
Particle Model of Matter
Space Physics
Waves
Topic overviewTransverse and longitudinal waves, and the wave equationWave properties, and refraction at a boundaryReflection of 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
Types and uses of electromagnetic waves
- 3 things to know
- Paper 2
Overview
Electromagnetic waves as transverse waves that transfer energy, the continuous spectrum and a single speed in a vacuum, the order of the groups by wavelength and frequency, the colours of visible light, energy transferred to an absorber, and the uses of radio waves, microwaves, infrared, visible light, ultraviolet, X-rays and gamma rays.
What you need to know
Answer each one before you reveal it.
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Key term
What is meant by saying that the electromagnetic spectrum is continuous?
Key term
List the groups of the electromagnetic spectrum in order from the longest wavelength to the shortest.
Questions from this subtopic
Each one with the model answer underneath.
- 1
What type of wave is every electromagnetic wave?
Model answer
A transverse wave.
- 2
What do electromagnetic waves transfer, and between what?
Model answer
They transfer energy from the source of the waves to an absorber.
- 3
What is meant by saying that the electromagnetic spectrum is continuous?
Model answer
The wavelengths run smoothly from one group to the next with no gaps between them.
- 4
How does the speed of radio waves through a vacuum compare with the speed of gamma rays?
Model answer
They are the same, because all electromagnetic waves travel at the same speed through a vacuum or air.
- 5
List the groups of the electromagnetic spectrum in order from the longest wavelength to the shortest.
Model answer
Radio, microwave, infrared, visible light, ultraviolet, X-rays and gamma rays.
- 6
Which group of the electromagnetic spectrum has the highest frequency?
Model answer
Gamma rays.
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