Waves, Superposition, Optics & Doppler Effect
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Free Maths Q & A Practice 1 of 5 free exam-style exercises in this topic
The graph below shows the displacement of a transverse wave against distance along its direction of travel, at a particular instant in time. Two points on the wave, \(P\) and \(Q\), are marked, separated by \(3.0\text{ cm}\).

P Q 0 4 16 Distance / cm y

The wavelength of the wave is \(4.0\text{ cm}\). What is the phase difference between points \(P\) and \(Q\)?
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