What does the acronym LASER stand for?

The acronym LASER stands for "Light Amplification via Stimulated Emission of Radiation." This definition is widely accepted in the field of physics and technology, particularly in the context of how lasers operate.

The process of stimulated emission is fundamental to the behavior of lasers. In a laser, photons of a specific wavelength stimulate excited atoms in a medium to emit additional photons of the same wavelength, thus amplifying the light. This results in a coherent beam of light that is tightly focused and can be used in various applications, including medical, industrial, and scientific fields.

Understanding this concept is essential not just for recognizing the definition, but also for grasping the underlying principles of laser technology and its applications in skin science and other areas.