Laser, Science

LASER stands for Light Amplification by Stimulated Emission of Radiation:

It's a fairly long string of words. Well, don't  let it stop you  from reading further. What we wish to bring out here is that lasers produce a very special kind of  light. The light that lasers produce has several useful properties that make it different from ordinary light. It is becarise of  these properties that laser light can be put  to work in a number of ways. You may wonder what the difference between ordinary light and light from a laser is. Light from the Sun or from a lamp in your home is a mixture of many wavelengths. Each wavelength produces a different colour. These colours mix and form ordinary light. We have all seen colours  in the sunlight separating out to form a rainbow in the sky after a rainy day. Moreover. light waves from an ordinary source of  light are all jumbled up and uncoordinated in  their movement.  

1271_lasser.png

Laser light is made up of waves of  the same wavelength. What is more, all  the nvavek  in a laser beam are organised to proceed exactiy in step (in  phase) with each other. This property of  lasers is called coherence. It reminds you of contingents of smartly dressed mean moving in unison in the Republic Day parade. Or of  the uniform movement of oars in boat races of Kerala held on Onam. Does it not? As a result of coherence,  light waves in a laser beam can travel laige distames without spreading apart. Because a laser beam does not spread out.  there is a large concentruriort  of energy per unit area on  the object on which the laser beam falls. " 

Posted Date: 9/29/2012 1:33:25 AM | Location : United States







Related Discussions:- Laser, Assignment Help, Ask Question on Laser, Get Answer, Expert's Help, Laser Discussions

Write discussion on Laser
Your posts are moderated
Related Questions
I am looking for someone who could provide assistance for a student in neuroimaging degree regarding research project and data analysis in addition to dissertation writing.

In the following table state how gymnosperms are adapted for living on land with respects to each of the following aspects Aspect Adaptation for living on land Alternation of Gener

The active ingredient in Antabuse, a drug used for the treatment of chronic alcoholism, is tetraethylthiuram disulfide, C10H20N2S4 (fw = 296.54). The sulfur in a 0.4329 g. sample o

Explain the Digestion of Food Salivary amylase or ptyalin acts on cooked starches (polysaccharides) and changes them into maltose as shown herewith. Boiled starch → soluble

information about the eyes

Accident Reporting Procedure : It is better to use incident book and accident report forms for the purposes of keeping records of accidents. The incident book is to be maintained

How to make a constellarium A constellarium is a simple device used in teaching the shapes of several constellations. Get a cardboard or wood box and remove one end. Draw the s

Determine about the term Actinomycetes - Soil Flora It have characteristics which are transitional between bacteria and fungi and are sometimes called fungi - like bacteria. Th

Explain the Menopause The cessation of menstruation is menopause. Natural menopause typically occurs between 45 and 55 years of age. It is caused by changes in concentration of

hi can you help me on my science