OCR•A-Level•Physics
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Electrons, Waves and Photons
Electricity, waves, quantum physics and optics
Practice 86 subtopics in Electrons, Waves and Photons. All questions match the OCR A-Level specification.
About Electrons, Waves and Photons
Electrons, Waves and Photons is a key topic in the OCR A-Level Physicsspecification. This topic covers electricity, waves, quantum physics and optics.
Master all 86 subtopics below with unlimited AI-generated questions. Each subtopic page includes sample questions and the ability to generate unlimited practice questions with detailed solutions.
All Subtopics (86)
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Electric chargeElementary chargeElectric currentConventional currentElectron flowI = Q/tKirchhoff's first lawConservation of chargeMean drift velocityNumber densityCurrent in metalsCurrent in semiconductorsPotential differenceElectromotive force (EMF)Energy transfer in circuitsElectron voltResistanceOhm's lawOhmic conductorsI-V characteristicsFilament lampThermistorLight-dependent resistor (LDR)DiodeLight-emitting diode (LED)ResistivityEffect of temperature on resistanceElectrical powerPower equationsEnergy dissipationSeries circuitsParallel circuitsKirchhoff's second lawResistors in seriesResistors in parallelPotential dividerPotential divider equationSensor circuitsInternal resistanceLost voltsTerminal potential differenceEMF and internal resistance equationPower output from sourceProgressive wavesTransverse wavesLongitudinal wavesWave propertiesWavelengthFrequencyPeriodAmplitudePhase and phase differenceWave speed equationIntensityIntensity and amplitudeReflectionRefractionRefractive indexSnell's lawTotal internal reflectionCritical angleOptical fibresDiffractionPolarisationPolarised lightMalus' lawApplications of polarisationPhotonsPhoton energyPlanck constantPhotoelectric effectThreshold frequencyWork functionEinstein's photoelectric equationStopping potentialWave-particle dualityde Broglie wavelengthElectron diffractionEnergy levelsLine spectraEmission spectraAbsorption spectraPhoton emission and absorptionGround stateExcited statesIonisation energy
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