stimulated emission

Stimulated emission is a process in which an incoming photon (a particle of light) causes an excited atom or molecule to release its own photon. This newly emitted photon has the same energy, phase, and direction as the incoming one, resulting in light that is coherent and intensified. This principle is fundamental to the operation of lasers, where it leads to the amplification of light through many such emissions, producing a powerful and focused beam. Essentially, it’s a way of creating more light through interaction between photons and excited particles.