What is the wavelength of light emitted when the electron in a hydrogen atom undergoes transition from an energy level with n = 5 to an energy level with n = 3 ?

Explanation

`bar(upsilon)=R[(1)/(n_(1)^(2))-(1)/(n_(2)^(2))]`
`bar(upsilon)=R[(1)/(3^(2))-(1)/(5^(2))]=R[(25-9)/(9xx25)]=(16xxR)/(9xx25)`
`lamda-(9xx25)/(16xxR)=(9xx25)/(16)xx912Å=12825Å`
`=12825xx10^(-10)m " (or)" 1282.5xx10^(-9)m " (or)" 112,821Å`
(Note : Take `(1)/(R)=912Å)`