Key term
AQA A-Level Physics 7408
Measurements and Their Errors
Particles and Radiation
Topic overviewConstituents of the atomStable and unstable nucleiParticles, antiparticles and photonsParticle interactionsClassification of particlesQuarks and antiquarksApplications of conservation lawsThe photoelectric effectCollisions of electrons with atomsEnergy levels and photon emissionWave-particle duality
Waves
Mechanics and Materials
Electricity
Further Mechanics and Thermal Physics
Fields and Their Consequences
Topic overviewFieldsNewton's lawGravitational field strengthGravitational potentialOrbits of planets and satellitesCoulomb's lawElectric field strengthElectric potentialCapacitanceParallel plate capacitorEnergy stored by a capacitorCapacitor charge and dischargeMagnetic flux densityMoving charges in a magnetic fieldMagnetic flux and flux linkageElectromagnetic inductionAlternating currentsTransformers
Nuclear Physics
AstrophysicsOptional topic
Topic overviewAstronomical telescope consisting of two converging lensesReflecting telescopesSingle dish radio telescopes, I-R, U-V and X-ray telescopesAdvantages of large diameter telescopesClassification by luminosityAbsolute magnitude, MClassification by temperature, black-body radiationPrinciples of the use of stellar spectral classesThe Hertzsprung-Russell (HR) diagramSupernovae, neutron stars and black holesDoppler effectHubble's lawQuasarsDetection of exoplanets
Medical PhysicsOptional topic
Topic overviewPhysics of visionDefects of vision and their correction using lensesEar as a sound detection systemSensitivity and frequency responseDefects of hearingSimple ECG machines and the normal ECG waveformUltrasound imagingFibre optics and endoscopyMagnetic resonance (MR) scannerThe physics of diagnostic X-raysImage detection and enhancementAbsorption of X-raysCT scannerImaging techniquesHalf-lifeGamma cameraUse of high-energy X-raysUse of radioactive implantsImaging comparisons
Engineering PhysicsOptional topic
Turning Points in PhysicsOptional topic
Topic overviewCathode raysThermionic emission of electronsSpecific charge of the electronPrinciple of Millikan's determination of the electronic charge, eNewton's corpuscular theory of lightSignificance of Young's double slits experimentElectromagnetic wavesThe discovery of photoelectricityWave–particle dualityElectron microscopesThe Michelson-Morley experimentEinstein's theory of special relativityTime dilationLength contractionRelativistic mass and energy
ElectronicsOptional topic
Topic overviewMOSFET (metal-oxide semiconducting field-effect transistor)Zener diodePhotodiodeHall effect sensorDifference between analogue and digital signalsLC resonance filtersThe ideal operational amplifierInverting amplifier configurationNon-inverting amplifier configurationSumming amplifier configurationReal operational amplifiersCombinational logicSequential logicAstablesPrinciples of communication systemsTransmission mediaTime-division multiplexingAmplitude (AM) and frequency modulation (FM) techniques
Particles and Radiation
Particle interactions
- 6 things to know
- Papers 1 and 3
Overview
The four fundamental interactions and their exchange particles, and Feynman diagrams for beta decay and electron capture.
What you need to know
Answer each one before you reveal it.
Your recallNot started
Key term
How are forces between elementary particles explained, what do exchange particles transfer, and what carries the electromagnetic force?
Key term
What does the W⁻ boson decay into, and what happens in beta-plus decay?
Process
What does the proton absorb in electron capture, and which boson mediates it?
Key term
In an electron-proton collision via the weak interaction, which particle emits the W⁻ boson?
Key term
What physical quantity do exchange particles transfer between interacting particles?
Questions from this subtopic
Each one with the model answer underneath.
- 1
Name the four fundamental interactions in physics.
Model answer
Gravity, electromagnetic, weak nuclear, and strong nuclear.
- 2
Which fundamental interaction is responsible for the attraction between masses?
Model answer
Gravity.
- 3
Which fundamental interaction acts between charged particles?
Model answer
The electromagnetic interaction.
- 4
Which fundamental interaction is responsible for radioactive beta decay?
Model answer
The weak nuclear interaction.
- 5
Which fundamental interaction binds quarks together inside protons and neutrons?
Model answer
The strong nuclear interaction.
- 6
What alternative name is used for the strong nuclear force?
Model answer
The strong interaction.
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