In the spectrum of light of a luminous heavenly body the wavelength of a spectral line is
Channel: Doubtnut
Date: 2020-08-23

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`)