Lasers


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 maser at first, which was short for Microwave Amplification by Stimulated Emission of Radiation Masers. It produced microwaves of just one frequency. Then the laser was developed from the maser.
Several people have been accredited for the development of the laser’s basic design. These people are as follows: American Arthur L. Shcawlow, the ...

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the first dye laser.
To begin with, I will explain the definition of a laser: It is a device that produces a very narrow powerful beam of light. A laser light is a narrow beam of light, in which all the waves are traveling exactly at the same length and moving together as one. A laser light is made 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.” 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 ...

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transmitting information. are also used in scanning, measuring, heating, and guiding. A lot of are also used in surgery and medical work. It is the purity, intensity, and parallel nature of laser light that makes so useful.
Lasers are most commonly used in the recording of music, motion pictures computer data, and other materials on special disks called a “CD” , which is short for compact disk. Bursts of small light record information in the form of tiny pits. Lasers can also read and play back the information it has recorded on the CD. More lasers are used in CD players than in any other product.
Probably a laser’s greatest uses are in the field of fiber optics. ...

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Added: 8/2/2004 07:43:59 AM
Category: Science & Nature
Type: Premium Paper
Words: 1733
Pages: 7

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