i need it for a project
2007-11-22 05:33:28 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Light amplificaltion through stimulated emmission of radiation.
However what it means is that a laser produces coherent light.
Normally waves of light are not all 'in sync'. One peak is arriving while another crest is half a wavelength behind, and then a trough comes.
Coherent light means all the peaks and troughs come together, making it very intense and a very exact wavelength.
Different laser tubes give different characteristics. Semiconductor lasers have little intensity, while others are based on ruby tubes, CO2 etc. They use modulating signals the power of a medium AM radio station, and can punch holes in solid steel plate.
On most lasers, one end of the tube has a perfect mirror on it while the other end has a partial mirror, letting out some of the light beam.
2007-11-22 05:56:44 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Light
Amplification by
Stimulated
Emission of
Radiation
2007-11-22 06:52:52 · answer #2 · answered by Edward Cullen = <3 2 · 0⤊ 0⤋
Light Amplification by Stimulated Emission of Radiation.
The light is amplified BY stimulated emission, rather than the stimulated emission itself being amplified (although of course it is amplified).
2007-11-22 05:57:00 · answer #3 · answered by za 7 · 0⤊ 0⤋