Question

The first emission line of Balmer series for H-spectrum has the wave number equal to........ $c{m}^{-1}$.

• A.
• B.
• C.
• D.

Answer 1

The correct option is D

$V$ = $R[\frac{1}{n_1^2}-\frac{1}{n_2^2}]$ = $R[\frac{1}{4}-\frac{1}{9}]$