Question

A photons was absorbed by a hydrogen atom in its ground state, and the elctron was prompted to the fifth orbit. When the excited atom returuned to its ground state, visible and other quanta were emitted. In this process, how many maximum spectral lined could be obtained-
A. 1
B. 2
C. 5
D. 10

Answer 1

Correct Answer - D
`N= .^(n)C_(2) = .^(5)C_(2) = 10`