Question

State the similarities between Doppler
effect in sound and Doppler effect in light.​

Answer 1

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(1) When a listener (or observer) and a source (of sound or light) are in relative motion, a difference is observed between the recorded frequency and the emitted frequency.

(2) If the relative motion of the listener (or observer) and the source (of sound or light) is towardsneach other, the recorded frequency is higher than the emitted frequency.

(3) If the relative motion of the listener (or observer).and the source (of sound or light) is away from each other, the recorded frequency is lower than the emitted frequency.

(4) When the velocities of source and observer (listener) are not along the same line; their respective components along the line joining them should be considered for longitudinal Doppler effect