Question

Hydrogen atom are excited to n=4 state maximum number of spectral lines in the visible region

Answer 1

Answer:

See below.

Explanation:

The number of spectral lines in the visible region are given by,

$\dfrac {n\left( n+1\right) }{2}$

For n = 4 ,

$\dfrac {4\left( 4+1\right) }{2}=10$