In the spectrum of light of a luminous heavenly body the wavelength of a spectral line is measured to be 4747 Å while actual wavelength of the line is 4700 Å. The relative velocity of the heavenly body with respect to earth will be (velocity of light is 
)
A
moving towards the earth
B
moving away from the earth
C
moving towards the earth
D
moving away from the earth
Text Solution
Verified by ExpertsThe correct answer is:
D
away from earth
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