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0 votes
3.2k views
in Physics by (70.7k points)

An engine whistling at a constant frequency n0 and moving with a constant velocity goes past a stationary observer. As the engine crosses him, the frequency of the sound heard by him changes by a factor f. The actual differences in the frequencies of the sound heard by him before and after the engine crosses him is

(a) 1/2n0(1 - f2)

(b) 1/2n0((1 - f2)/f)

(c) n0(1 - f/1 + f)

(d) 1/2n0(1 - f/1 + f)

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1 Answer

+1 vote
by (65.1k points)

The correct option  (b) 1/2n0((1 - f2)/f)

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