Question

An electron in H-atom makes a transition from n = 3 to n = 1. The recoil momentum of the H-atom will be ______.

Options

• 6.45 × 10^-27 N s

• 6.8 × 10^-27 N s

• 6.45 × 10^-24 N s

• 6.8 × 10^-24 N s

Answer 1

An electron in H-atom makes a transition from n = 3 to n = 1. The recoil momentum of the H-atom will be 6.45 × 10^-27 N s.

Explanation:

`E/c = (12.09 xx 1.6 xx 10^-19)/(3 xx 10^8)Ns = 6.45 xx 10^-27` N s