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Lasers
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Did you know that some laser beams are small enough and powerful enough to drill two hundred holes on a spot as tiny as the head of a pin?
The first major advancement in laser development came in 1954. This was the year that Charles H. Townes, an American physicist, created a device that amplified microwaves. This device was actually called a mase ....
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....ade up of only one wavelength and it is a single pure color, while a normal light has many different wavelengths or colors.
The most common laser has three parts to it. They are energy source, an active medium, and optical cavity. An energy source can be anything that can give energy to the active medium through a process called “pumping.R.... |
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Page count: 7 |
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