In the stimulated emission, the photons with certain energy will trigger an atom in an excited state to emit a photon to transit to a lower energy state. According to the intensity of the light falling on the atom, the atom will absorb a photon and excites, this process is known as a ...
2.Definition of Isotopes: - Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons, resulting in different atomic masses. 3.Weighted Average Concept: - The term "average" in atomic mass signifies that it is not just the simple average ...