When considering light as made up of individual pieces each characterized by a particular amount of energy the pieces are called?

When considering light as made up of individual pieces, each characterized by a particular amount of energy, these pieces are called photons. Photons are the fundamental particles of light and electromagnetic radiation, and their energy is directly related to their frequency and wavelength. The concept of photons is a key aspect of quantum mechanics and helps explain various phenomena such as the photoelectric effect.