Laser

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A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The term "laser" originated as an acronym for "light amplification by stimulated emission of radiation".[1]

Wavelengths

Currently there are 7 "common" visible wavelengths:

405nm

445nm(450nm)

462nm

520nm

532nm

635nm(638nm)

650nm

Types

Laser Diode

Dye Laser

Argon Ion Laser

HeNe