When an electron moves from a higher energy level to a lower energy level within an atom, the excess energy is typically released in the form of electromagnetic radiation. This phenomenon is known as emission or the emission of photons.
The energy of the emitted photon corresponds to the difference in energy between the initial and final energy levels of the electron. According to the Bohr model of the atom, electrons occupy discrete energy levels or orbitals. As an electron transitions from a higher energy level to a lower energy level, it releases energy equal to the difference in energy between the two levels.
The emitted photon carries this energy and can have various wavelengths, corresponding to different regions of the electromagnetic spectrum, such as visible light, ultraviolet light, or even X-rays, depending on the energy difference involved.
It's important to note that this phenomenon is a simplified description based on the Bohr model and does not fully capture the quantum mechanical behavior of electrons. In reality, the process of electron transitions and the corresponding emission of energy is more complex and is described by the principles of quantum mechanics.