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 `3 xx 10^(8) m//s`)

Options

A. `3 xx 10^(5) m//s` moving towards the earth
B. `3 xx 10^(5) m//s` moving away from the earth
C. `3 xx 10^(6) m//s` moving towards the earth
D. `3 xx 10^(6) m//s` moving away from the earth

Answer

D