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.

Answer

`2.5 xx 10^(6) ms^(-1)`

Explanation

Here, `lambda = 6000 Å, Delta lambda = 50 Å, v = ?`
`v = (Delta lambda)/( lambda) xx c = (50)/(6000) xx 3 xx 10^(8) = 2.5 xx 10^(6)m//s`