A stationary emitter generates a sound at some particular frequency. The frequency detected by a receiver moving away from the emitter at speed v_r(

Question

A stationary emitter generates a sound at some particular frequency. The frequency detected by a receiver moving away from the emitter at speed v_r(< the speed of sound in still air) is roughly the same as if the A) emitter were to move at the same speed v_raway from a stationary receiver. B) emitter were to move at the same speed v_rtoward a stationary receiver. C) receiver were to move at the same speed v_rtoward a stationary receiver. D) none of the above.

Quizplus · Accepted Answer

The Doppler effect describes the change in frequency of a wave in relation to an observer moving relative to the source of the wave. The effect is symmetrical: the observed frequency change when the source moves away from a stationary observer is the same as when the observer moves away from a stationary source at the same speed.

A Stationary Emitter Generates a Sound at Some Particular Frequency