J.R. S. answered 01/06/22
Ph.D. University Professor with 10+ years Tutoring Experience
They radiate energy when they fall from a higher energy level to a lower energy level. They absorb energy when the opposite transition occurs.

J.R. S.
01/06/22
0825 2.
ok thanks01/06/22
0825 2.
Yes, but why don't they radiate energy when revolving around the nucleus in the energy level?01/06/22