What does the term "laser" stand for?

The term "laser" stands for "Light Amplification by Stimulated Emission of Radiation." This definition is fundamental in understanding how lasers work. In this context:

• "Light" refers to the electromagnetic radiation that lasers produce, typically in the visible spectrum, but it can also include ultraviolet and infrared radiation.

• "Amplification" indicates that the laser increases the intensity of light through a process where photons stimulate the emission of more photons, resulting in a coherent light beam.

• "Stimulated Emission" is the critical process that underpins laser operation; when an electron in an energized atom or molecule drops to a lower energy state, it emits a photon. This emitted photon can stimulate other excited atoms to emit more photons, creating a chain reaction.

• "Radiation" here pertains to the energy emitted as light.

This definition establishes the scientific basis for the technology behind lasers, which are used across various fields, including medicine, communication, and manufacturing. The other options provided confuse terms or misstate essential concepts related to laser technology, making them incorrect.