OCR A Level Physics Paper 2
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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"
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0
Page
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"
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