Lasers 2
The laser is a device that produces a beam of light. The beam is produced by a process known as stimulated emission, and the word “laser” is an acronym for the phrase “light amplification by stimulated emission of radiation.” Lasers amplify light and produce coherent light beams. A light beam is coherent when its waves or photons are in step with one another. Laser light can be made extremely intense, highly directional, and very pure in color. Light can be characterized both by its frequency, or number of wave crests passing a given point per second, and by its wavelength. Different wavelengths of light are seen as different colors. Like radio waves, light can also carry information. The information in the beam varies in the frequency or shape of the light wave. Because light waves are of much higher frequencies than radio waves, the have a higher information carrying capacity. In beams of light,individual photon waves are not moving along together because they are not being emitted at the same instant but instead in random short bursts. Such beams are called incoherent. The process for laser action, was first proposed by Albert Einstein in 1917. The working principles of lasers were outlined
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Some common words found in the essay are:
LASERS Lasers, Theodore Maiman, Medicine Intense, Communication Laser, Research Lasers, PRINCIPLES Light, , Military Laser, Hard Townes, Ronald Reagan, laser light, laser beams, active medium, fax machine offices, light carry, american physicist, radio waves, laser action, scientific research, machine offices, laser beam,
Approximate Word count = 1164
Approximate Pages = 5 (250 words per page double spaced)
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