Question

13. As long as electron remains in an orbit, it does not emit or absorb energy.
When does it emit or absorb energy?shote​

Answer 1

Explanation:

(1)

Electron absorb energy when it is incident by a photon (collision occurs: transfer of energy)

after absorbing energy electron become excited and transit to higher energy level !

(2)

It emit energy during transition from higher energy level to lower energy in the form of photon !

Hence losing its energy on its way back!