Question

How to find the number of possible lines when an electron is excited from one orbit to another?

Answer 1

Explanation:

Possible spectral lines= (n2-n1)(n2-n1+1)/2 this is the possible numbers.But in visible region, electron when jumps from n2=5 to n1=1 then according to the formula possible lines=(5-1)(5-1+1)/2=10So the possibilities are 5 to 4, 5 to 3, 5 to 2, 5 to 1, 4 to 3, 4 to 2, 4 to 1, 3 to 2, 3 to 1, 2 to 1.