Light coming from a star is observed to have a wavelength of `3737 Å`, while its real wavelength is `3700 Å`. The speed of the star relative to the earth is [Speed of light `3 xx 10^(8) m//s`]

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 )

The apparent wavelength of the light from a star, moving away from the earth is 0.01% more than its real wavelength. The speed of the star with respect to earth is

For a colour of light the wavelength for air is 6000 Å and in water the wavelength is 4500 Å . Then the speed of light in water will be

The apparent wavelength of the light from a star, moving away from the earth, is 0.01% more than its real wave length. The speed of the star with respect to the earth is ……………… .