the apparent wavelength of light from a star moving away from the earth in 0 02% more than the actual - Physics - Wave Optics

Question

the apparent wavelength of light from a star moving away from the
earth in 0 02% more than the actual wavelenght the velocity of the
star is ? (ans : 30km/s)

Vaibhav T. · Accepted Answer

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the apparent wavelength of light from a star moving away from the earth in 0.02% more than the actual wavelenght. the velocity of the star is ? (ans : 30km/s)