OCR A Level Physics Paper 2 | Brian Peter | 2025 | Key Definitions and Formula-Based Exam, Exams of Physics

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OCR A Level Physics Paper 2

BRIAN PETER

Progressive wave - CORRECT ANSWER a wave which transfers energy through the material" "Longitudinal wave - CORRECT ANSWER wave where particles move in the same direction as the source" "Transverse wave - CORRECT ANSWER wave where particles move in a perpendicular direction to the source" "Refraction - CORRECT ANSWER when a wave bends at a boundary between two materials of different density causing a change in speed" "What type of waves can be polarised? - CORRECT ANSWER Transverse" "Polarised wave - CORRECT ANSWER A wave which only oscillates along one axis" "What happens to the intensity when a wave is polarised? - CORRECT ANSWER the intensity is reduced" "Intensity defined in terms of power - CORRECT ANSWER Power/Area" "What relates intensity and amplitude? - CORRECT ANSWER Intensity is proportional to amplitude squared" "Diffraction - CORRECT ANSWER when a wave spreads out as it passes through a gap" "Total internal reflection condition 1 - CORRECT ANSWER light must be travelling from a material with a higher refractive index to a material with a lower refractive index" "Total internal reflection condition 2 - CORRECT ANSWER The angle of incidence to the normal must be above the critical angle" "Superposition - CORRECT ANSWER when two waves overlap they either add up or cancel out" "Coherent Wave - CORRECT ANSWER waves with a constant phase different" "Stationary Wave - CORRECT ANSWER when two progressive waves travelling in opposite directions, superpose" "Node - CORRECT ANSWER A point on the wave with zero amplitude" "Antinode - CORRECT ANSWER A point on the wave with maximum displacement"