An electrons of a stationary hydrogen aton passes form the fifth enegry level to the ground level. The velocity that the atom acquired as a result of photon emission will be
`(m` is the mass of the electron, `R`, Rydberg constanrt and `h`, Planck's constant)

Options

A. `(25 m)/(24 h R)`
B. `(24 m)/(24h R)`
C. `(24 m)/(25h R)`
D. `(25 m)/(24h R)`

Answer

C

Explanation

Wavelength observed from transition of `n_(i) " to " n_(f) " is " lamda=(1)/([(1)/(n_(f)^(2))-(1)/(n_(i)^(2))])`
`n_(i)=5 n_(f)=1`
Also `v=(h)/(lamda m)`