What does the acronym "laser" stand for?

The term "laser" is an acronym that stands for "Light Amplification by Stimulated Emission of Radiation." This definition captures the fundamental principle behind how lasers operate. The process of light amplification occurs when photons stimulate the emission of additional photons, resulting in a coherent and focused beam of light.

In this context, "stimulated emission" is a key concept because it is the mechanism by which lasers produce light, distinguishing them from other light sources that may emit light through spontaneous emission. The term emphasizes the controlled and amplified nature of the light produced by lasers, which is essential for their various applications in fields like medicine, telecommunications, and manufacturing.

Understanding this acronym is vital for recognizing the importance of lasers in modern technology and science, as well as for grasping the safety protocols associated with their use.