Etymology:
The word "laser" is an acronym for "Light Amplification by Stimulated Emission of Radiation." It was coined by Arthur Schawlow and Charles Townes in 1957.
Meaning:
A laser is a device that emits a highly concentrated beam of light of a specific wavelength. The light is produced by the stimulated emission of photons, which are particles of light.
Origin:
The concept of the laser was first proposed by Albert Einstein in 1917. However, it wasn't until the 1950s that scientists developed the technology to make lasers a reality.
The first working laser was built by Theodore Maiman in 1960. It used a ruby crystal to produce a beam of red light. Since then, lasers have been developed that can emit light of various wavelengths, including infrared, visible light, and ultraviolet light.
Use:
Lasers have a wide range of applications, including:
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