What are wavefronts?
2 marks · EasyThe diagram shows a section of a wave on a rope. Points P, Q, R, and S are marked on the wave.
State the type of wave represented in the diagram if the vibrations are at right angles to the direction of energy transfer.
Define what is meant by a wavefront.
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(a) Transverse wave
(b) A wavefront is a line where all vibrations are in phase and the same distance from the source.
Common mistakes: Saying longitudinal instead of transverse; Incorrect definition of wavefront
Show mark scheme and worked solution
Marking points
B1 (a) · 1 mark · Correctly identifies 'transverse wave'.
B1 (b) · 1 mark · Defines a wavefront as a line/region where all vibrations are in phase and the same distance from the source.
Worked solution
a) Since the vibrations are at right angles to the direction of energy transfer, the wave is a transverse wave.
b) A wavefront is a line where all the vibrations are in phase and are the same distance from the source.