A stationary source emits sound waves of frequency 500 H z . Two observers moving along a line passing through the source detect sound to be of frequencies 480 H z and 530 H z . Their respective speeds are, in m s - 1 , (Given speed of soun

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A stationary source emits sound waves of frequency 500 H z . Two observers moving along a line passing through the source detect sound to be of frequencies 480 H z and 530 H z . Their respective speeds are, in m s - 1 , (Given speed of sound = 300 m / s )

Quantrex Academy · Accepted Answer

Correct answer: C. 12 , 18

Frequency observed by observer A, f A = 500 300 - V A 300 480 = 500 ( 300 - V A ) 300 V A = 1500 - 1440 5 = 12 m / s Frequency observed by observer B, f B = 500 300 + V B 300 530 = 500 300 + V B 300 V B = 18 m / s

A stationary source emits sound waves of frequency 500 H z . Two observers moving along a line passing through the source detect sound to be of frequencies 480 H z and 530 H z . Their respective speeds are, in m s - 1 , (Given speed of sound = 300 m / s )

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