What does the acronym "laser" stand for?

The acronym "laser" stands for "Light Amplification by Stimulated Emission of Radiation." This definition captures the fundamental principles of how lasers operate. In this process, light is generated and amplified through stimulated emission, which occurs when electrons in atoms or molecules are excited to a higher energy state and then return to their ground state, releasing photons in the process. This results in a coherent and focused stream of light, which is characteristic of lasers.

Understanding this definition is crucial in diverse fields, particularly in medical aesthetics, where lasers are employed for various procedures like skin resurfacing, hair removal, and tattoo removal, among others. These applications rely on the precise nature of laser technology to target specific tissues while minimizing damage to surrounding areas.