The wave number of the spectral line in the emission spectrum of hydrogen will be equal to `(8)/(9)` times the Rydberg's constant if the electron jumps from …………..:-

Options

A. `n = 3` to `n = 1`
B. `n = 10` to `n = 1`
C. `n = 9` to `n = 1`
D. `n = 2` to `n = 1`

Answer

A

Explanation

`barv = R_H[1/(n_1^2) - 1/(n_2^2)] = 8/9 R_H`
`:. 1/(n_1^2) - 1/(n_2^2) = 8/9`
`:. n_1 = 1`
`n_2 = 3`.