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An observer moves towards a stationary s...

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

A

`1.2 f, lambda`

B

`f, 1.2 lambda`

C

`0.8 f, 0.8 lambda`

D

`1.2 f, 1.2 lambda`

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The correct Answer is:
A
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