Question

What happens when a electron moves from the first energy level to the second??

Answer 1

The atom absorbs or emits light in discrete packets called photons, and each photon has a definite energy. Only a photon with an energy of exactly 10.2 eV can be absorbed or emitted when the electron jumps between the n = 1 and n = 2 energy levels.

Answer 2

the atom absorb the light in the discrete packet in the photons