Due to Doppler's effect, the shift in wavelength observed is `0.1 Å` for a star producing wavelength 6000 Å. Velocity of recession of the star will be

Due to Doppler effect, the shift in wavelength observed is 0.1 Å, for a star producing a wavelength 6000 Å. The velocity of recession of the star will be

A star is moving away from earth and shift in spectral line of wavelength 5700 Å is 1.90 Å . Velocity of the star is :

A star is moving away from earth and shift in spectral line of wavelength 5700 Å is 1.90 Å . Velocity of the star is :

The ratio of the energy of a photon of wavelength 3000 "Å" to that of photon of wavelength 6000 "Å" 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

Light from a galaxy, having wavelength 6000 Å is found to be shifted towards red by 50 Å . Calculate velocity of recession of the galaxy.