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A rocket is going away from the earth at...

A rocket is going away from the earth at a speed 0.2 c , where c = speed of light. It emits a signal of frequency `4 xx 10^(7)Hz` . What will be the frequency observed by an observer on the earth

A

`3.2xx10^(7)Hz`

B

`4.8xx10^(7)Hz`

C

`4.0xx10^(7)Hz`

D

`5.3xx10^(7)Hz`

Text Solution

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The correct Answer is:
B
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