What are wavefronts?
2 marks · NormalExplain how you could identify points on a spring that are on the same wavefront.
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They are points where the particles are moving in the same way (in phase) and are the same distance from the source.
Also accept: All points have the same phase of vibration
Common mistakes: Selecting only crests; Omitting reference to phase
Show mark scheme and worked solution
Marking points
B1 · 1 mark · States same phase/vibration.
B2 · 1 mark · States same distance from source.
Worked solution
Points on the same wavefront can be found by looking for positions on the spring where the particles vibrate together in phase and are the same distance from where the wave started.