Answer:
Stimulated emission
Explanation:
The laser beam is so powerful due to the large amount of energy exerted on small areas, and may have a brighter glow than an electric lamp.
Physicist Albert Einstein laid the groundwork for the study of lasers in the second decade of the 20th century, and the first laser appeared around 1960.
Laser light is capable of emitting photons at a single frequency (and consequently with a single color) in other words, light waves produced from specific stimuli, with very little divergence between their light rays.
This ability to emit light waves continuously, is the main physical effect behind the operation of the laser, and is called stimulated emission.
