What is light particle is emitted when an electron transitions from a higher energy level to a lower energy level one?

When an electron transitions from a higher energy level to a lower energy level in an atom, it emits a photon, which is a particle of light. The energy of the emitted photon corresponds to the difference in energy between the two levels, resulting in the release of electromagnetic radiation. This process is fundamental to various phenomena, including the emission spectra of elements.