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QAIPMT-2003-Ph-2718: NEET 2003 Physics - Class 11 AIPMT-2003-Ph-2718 Solution: An observer moves towards a stationary source of sound with a…

An observer moves towards a stationary source of sound with a speed 1/5th of the speed of sound. The wavelength and frequency of the source emitted are

\lambda

and f respectively. The apparent frequency and wavelength recorded by the observer are respectively

Multiple Choice Options

A 1.2 f, 1.2 $\lambda$
B 1.2 f, $\lambda$
C f, 1.2 $\lambda$
D 0.8 f, 0.8 $\lambda$

Step-by-Step Verified Solution

Apparent frequency, f _ = v + v 0 v f = v + ( 1 / 5 ) v v f = 1.2 f Wavelength does not change by motion of observer.

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