Question

Wave no. of the spectral line in the emission spectrum of hydrogen is $8/9$ mass rydberg const suggest e jump.

Answer 1

According to question $v^{-}=R_H[1/n_1^2-1/n_2^2]=R_{H}8/9$

So $[1/n_1^2-1/n_2^2]=8/9$

$[1/1^2-1/3^2]=8/9$ so the value of $n_1$ is 1 and $n_2$ is 3

so transition takes palce third orbit to first orbit.