LASER (Light Amplification by Stimulated Emission of Radiation)

Definition

A laser is device that emits intense beams of coherent monochromatic light or other electromagnetic radiation via stimulated emission process.

Related terms

Coherent light: This is light in which waves are all at the same frequency and phase.

Monochromatic light: This is light of a single color, or having a single wavelength.

Stimulated emission: This is the process by which an incoming photon of a specific frequency can interact with an excited atomic electron (or other excited molecular state), causing it to drop to a lower energy level.