Question

Explain the Doppler effect in sound.​

Answer 1

Answer:

The Doppler effect is the apparent shift in wave frequency due to the movement of the wave source. The Doppler effect explains why we perceive a change in pitch of the sound of a passing siren. It also explains the presence of shock waves and sonic booms when observing a super sonic aircraft

Explanation:

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Answer 2

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(1) If a source of sound approaches a stationary!listener, there is an increase in the number of!sound waves reaching the listener per unit time Consequently, the apparent frequency of sound heard by the listener is greater than the true frequency of sound. This effect is also observed when (i) the listener moves towards a stationary source of sound or (ii) both the source and the listener move towards each other.

(2) If a source of sound moves away from a stationary listener, there is a decrease in the number of sound waves reaching the listener per unit time. Consequently, the apparent frequency of sound heard by the listener is less than the true frequency of sound. This effect is also observed when the listener moves away from a stationary source of sound or in both the source and the listener move away from each other

The apparent change in frequency called the Doppler shift depends on the velocities of i) sound. ii) listener and the source sound