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The wavelength of light observed on the ...

The wavelength of light observed on the earth , from a moving star is found to decrease by 0.05% .Relative to earth , the star is

A

moving away with a velocity of `1.5 xx 10^(5) m//s`

B

coming closer with a velocity of `1.5 xx 10^(5) m//s`

C

moving away with a velocity of `1.5 xx 10^(4) m//s`

D

coming closer with a velocity of `1.5 xx 10^(4) m//s`

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The correct Answer is:
B
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