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The Laser - Online Term Paper

The Laser


Before we can learn about we need to know a little bit about
light (since that is what a laser is made of). Light from our sun, or from an
electric bulb, is called white light. It is really a mixture of all the
different colours of light. The colours range from violet, indigo, and blue, to
green, yellow, orange, and red. These make up the visible part of the
electromagnetic spectrum. Light is made up of particles, called PHOTONS, which
travel in waves. The difference in the colour depends on the wavelength of the
light. Violet light has the shortest wavelength while red has the longest. There
are other parts of the electromagnetic spectrum which includes infra-red, radar,
television radio ...

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of Radiation. What does
that mean? Basically a laser is a device which produces and then amplifies light
waves and concentrates them into an intense penetrating beam.

The principles of the laser (and it's cousin the maser) were established
long before these devices were successfully developed. In 1916 Albert Einstein
proposed stimulated emission, and other fundamental ideas were discussed by V.A.
Fabrikant in 1940. These ideas, followed by decades of intensive development of
microwave technology set the stage for the first maser (a laser made up of
micro-waves), and this in turn helped to produce more advances in this area of
science. These efforts cumulated in July 1960 when Theodore H. Maiman announced
the generation of a pulse of coherent red light by means of a ruby crystal-- the
first laser.

Laser light is produced by pumping some form of energy, such as light, from
a flash tube (see below) into a LASING material, also known as a medium. Media
can be liquids, ...

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"The Laser." Essayworld.com. July 18, 2006. Accessed December 23, 2024. http://www.essayworld.com/essays/The-Laser/49305.
"The Laser." Essayworld.com. July 18, 2006. Accessed December 23, 2024. http://www.essayworld.com/essays/The-Laser/49305.
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PAPER DETAILS
Added: 7/18/2006 02:46:46 AM
Category: Science & Nature
Type: Free Paper
Words: 981
Pages: 4

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