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Lasers
Beginning of essay
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 ....
Middle of essay
....ve medium, and optical cavity. An energy source can be anything that can give energy to the active medium through a process called “pumping.” often use electricity; usually a device called a flash lamp, as the energy source. An active medium is any material that can be used to create a laser light. The optical cavity is the structure that encloses the active medium. Most cavities have mirrors on both ends, one that fully reflects light and another that partially reflects light. The .... |
| Number of words: 1733 |
Approximate pages: 7 |
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