An observer moves towards a stationary source of sound with a speed 1/ $5^{th}$ of the speed of sound. The wavelength and frequency of the source emitted are λ and f respectively. The apparent frequency and wavelength recorded by the observer are respectively :
A
1.2f, 1.2λ
B
1.2f, λ
C
f, 1.2λ
D
0.8f, 0.8λ

Question

An observer moves towards a stationary source of sound with a speed 1/ $5^{th}$ of the speed of sound. The wavelength and frequency of the source emitted are λ and f respectively. The apparent frequency and wavelength recorded by the observer are respectively :

A

1.2f, 1.2λ

B

1.2f, λ

C

f, 1.2λ

D

0.8f, 0.8λ

Accepted Answer

1.2f, λ

Answer

1.2f, 1.2λ

Answer

f, 1.2λ

Answer

0.8f, 0.8λ

AIPMT PRELIMS 2003 Physics Doppler Effect MCQ Question

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