The wavelength of the spectral line that corresponds to a transition in hydrogen atom from `n = 10` to ground state would be [In which part of electromagnetic spectrum this line liues?]`

Options

A. `92.25 nm`, ultraviolet
B. `92.25 nm`, infrared
C. `86.95 nm`, ultraviolet
D. `97.65 nm`, ultraviolet

Answer

A

Explanation

`(hc)/(lambda) = 13.6 [(1)/(1^(2)) - (1)/(10^(2))] = 13.6 xx 0.99`
`lambda = (1242)/(13.6 xx 0.99) n m = 92.25 nm`
The line belongs to `UV` part of electronmagnetic spectrum.