No. of visible lines when an electron returns from 5th orbit up to ground state in H spectrum:

Question

No. of visible lines when an electron returns from 5th orbit up to ground state in H spectrum: (A) 5 (B) 4 (C) 3 (D) 10

Tardigrade Admin · Accepted Answer

Number of visible lines when an electron returns from 5 th orbit to the ground state in the

H

spectrum is 10.
The number of spectral lines

= \frac{n ( n - 1 )}{2}

.
The number of spectral lines

= \frac{5 ( 5 - 1 )}{2} = 10

.
These lines belong to the UV region.
Note: Lyman series corresponds to transitions to

n = 1

level.

Q. No. of visible lines when an electron returns from $5^{t h}$ orbit up to ground state in $H$ spectrum: