Question

An electron jumps from energy level 1 to energy level 2 by absorbing a photon of energy 8 eV. What is the most likely energy of the photon that will be emitted by the electron when it moves back down to energy level 1?

Answer 1

Should it move back to level, it would lose the energy level it gained.

It would emit 8 eV of energy.

Answer 2

Answer: 8eV

Explanation:

This is because for an electron to jump from a lower energy level to a higher energy level, there is an exact amount of energy that it is required to absorb and will therefore emit the same amount of energy when falling back to its initial energy level. In this case the energy it absorbed was 8eV and will need to emit 8ev to fall back to the lower energy level.