What is the wave length of `H_(b)` line Balmer series of hydrogen spectrum ? (R = Rydberg constant)

Options

A. 36/5R
B. 5R/36
C. 3R/16
D. 16/3R

Answer

D

Explanation

`barv = R(1/(n_1^2)- 1/(n_2^2)) n_1 = 2 , n_2 = 4`
On substitution , `lambda = (9R)/(400)`