Science inventions

The name stands for light amplification by stimulated emission of radiation. )
2) What can laser do? (It can vaporize any substance on earth. )
3) Where can it be used? (Laser can be used in industry and science, communication, medicine)
4) What could one laser beam carry? (It could carry the radio, TV and telephone messages of the world simultaneously. )
Laser.
In the "War of Worlds" written before the turn of the century H. Wells told a fantastic story of how Martians almost invaded our Earth. Their weapon was a mysterious "sword of heat". Today Wells sword of heat has come to reality in the laser. The name stands for light amplification by stimulated emission of radiation.
Laser, one of the most sophisticated inventions of man, produces an intensive beam of light of a very pure single colour. It represents the fulfilment of one of the mankinds oldest dreams of technology to provide a light beam intensive enough to vaporize the hardest and most heat-resistant materials. It can indeed make lead run like water, when focused, it can vaporize any substance on earth. There is no material unamenable to laser treatment and by the end of 2000 laser will have become one of the main technological tools.
The applications of laser in industry and science are so many and so varied as to suggest magic. Scientists in many countries are working at a problem of combining laser and thermonuclear reaction - to produce a practically limitless source of energy.
The lasers most important potential may be its use in communications. The intensity of a laser can be rapidly changed to encode very complex signals. In principle, one laser beam, vibrating a billion times faster than ordinary radio waves, could carry the radio, TV and