A rocket is moving away from the earth a...

A rocket is moving away from the earth at a speed of `6 xx 10^(7) m//s` . The rocket has blue light in it. What will be the wavelength of light recorded by an observer on the earth (wavelength of blue light `= 4600 Å`)

A

4600 Å

B

5520 Å

C

3680 Å

D

3920 Å

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The correct Answer is:

B

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