When an electron moves from a higher energy level in an atom to a lower energy level, a. a redshifted spectrum is emitted. b. a photon is absorbed. c. a photon is emitted. d. a continuous spectrum is emitted.

C

Explanation:

The question asks to know what happens when an electron moves from a higher energy level to a lower energy level.

Firstly, it is important to note that when an electron moves from a lower energy level to a higher energy level, energy is absorbed by the atom. Conversely, when an electron moves from a region of higher energy to a region of lower energy, energy is released by the atom.

Thus we can say that the movement of an electron from a region of higher energy to a region of lower energy can result in the emission of a photon of light as energy is released by the atom