The wave length of `H_(delta)` line of Balmer series of a hydrogen atom is nearly `(R = 1.08 xx 10^(7) m^(-1))`

Options

A. `4090 A^@`
B. `5400 A^@`
C. `6800 A^@`
D. `7200 A^@`

Answer

A

Explanation

Balmer series `delta` line `implies n_1 , n_2 = 6`
`1/(lambda) = barv = R (1/(n_1^2) - 1/(n_2^2))`