Question

How many spectral lines are seen for hydrogen atom when electron jump from $n_2=5$ to $n_1=1$ in visible region?

• A. 10
• B. 3
• C. 4
• D. 5

Answer 1

The correct option is A 10

No. of spectral lines in hydrogen atom from $n_2-n_1$ is $\frac{(n_2-n_1)(n_2-n_1+1)}{2}$
As, $n_2=5$
$n_1=1$
$⟹10=\frac{(5-1)(5-1+1)}{2}$
The no. of spectral lines $=10$