If velocity of a galaxy relative to earth is `1.2 xx 10^(6)ms^(-2)` then percentage increase in wavelength of light from galaxy as compared to the similar source on earth will be :

If the velocity of electron in Bohr's first orbit is 2.19 xx 10^(6)ms^(-1) . The de-Broglie's wavelength is

If light from a galaxy observed on the earth's surface has a red shift, then

If light from a galaxy observed on the earth's surface has a red shift, then

The velocity of a moving galaxy is 300 kms^(-1) and the apparent change in wavelength of a spectral line emitted from the galaxy is observed as 0.5 nm. Then the actual wavelength of the spectral line is

If the velocity of the electron in Bohr's first orbit is 2.19 xx 10^(6) ms^(-1) . Calculate the de-Broglie wavelength with it.

Certain characteristic wavelength in the light from a galaxy in the constellation virgo are observed to be increased in wavelength, as compared with terrestrial sources, by about 0.4% . What is the radial speed of this galaxy with respect to earth ? Is it approacing or receding ?

The distance of a galaxy from the earth is of the order of 10^(25)m . The time taken by light to reach the earth from the galaxy is