A stationary hydrogen atom emits photon corresponding to the first line of Lyman series. If R is the Rydberg constant and M is the mass of the atom, then the velocity acquired by the atom is

Answer

`3.09xx10^(8)cm//sec`

Explanation

`E=-2.18xx10^(-18)(Ƶ)/(n^(2))g//"atom"`
`DeltaE=(E_(2)-E_(1))=(1)/(2)mv^(2)`
`V=1.89xx10^(6)m//sec`
`v=1.89xx10^(8)cm//sec`