State one distinction and one common feature between longitudinal and transverse waves.
(b(i))[2]
Explain why an interference pattern appears on the screen.
(b(ii))[2]
Calculate the gap between adjacent maxima.
(c)[1]
State and explain the effect, if any, on the separation of adjacent maxima when the laser is replaced by another laser emitting ultra-violet radiation.
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Difference: in a longitudinal wave the vibration is parallel to energy transfer, while in a transverse wave it is perpendicular” …