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
alternative naturalenergyresourcebasedo on undergroundhot water source

What is Parent material Parent material refers to the primary material from which the soil is formed. The parent material may be either a solid rock, a decomposed rock, organic

#ghhytiquestion..

Question 1. Discuss Problem Oriented Medical Records. 2. What is meant by colour coding? Explain the different types of colour coding. 3. What is a "Code Set"? Explain th

Mechanics: Another hnch  of  science which is, perhaps, the greatest contribution of Greek civilisation is mechanics. Mechanics developed out of  the necessities of  imgation,

would quartzite or sandstone break more easily. please explain

how can the theoretical paradigms be used to describe family in Kyrgyzstan?

To show how water rises in different types of soil Place about 15 cm of dissimilar types of soil in a series of lamp chimneys after tying a piece of cloth over the end of every

The simply-supported uniform beam shown in the ?gure below supports a mass m at a distance aL from the left support. Assume that the beam is relatively mass-less compared to the ma

Explain the Composition of Bile Bile is a complex fluid. It is yellowish green in colour and bitter in taste. It consists of: Water Mineral salts (chloride, potassium