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
where can glacier erosion occur?

Define the Pre Motor Areas of the Cerebrum The pre motor areas too lie in the frontal lobe immediately anterior to the motor area as highlighted in the Figure. The cells are th

Experiment of Making a model of a simple flower By Using of modelling clay, coloured paper and toothpicks make 3D-dimensional models representing the parts of a typical flower.

Can you please explain gas exchange to me

Cognitions  Mr. X sees himself as very capable to meet the demands of his environment (LSE=41) and has confidence in his abilities to deal with his problems (TRT=39). He sometim

what is the regulation of steady conditions inside an organism

Determine in detail about the Phosphorus  Phosphorus, with nitrogen and potassium is classed as a major nutrient element. It is a constituent of nucleic acids, phytin, phosphol

explain the factors that led to the decline of science in europe during iron age

the place of guidance and counselling in fostering stable growth and development in teaching and learning situation

equilibrium, Physics what is the effect of torque and equilibrium on taps, doors,handle bars and bicycles??