Radar also plays an important part in today's society. Meteorologists use radar to track storms. It makes their job easier and more accurate. This was a problem about 75 years ago when storms, such as tornadoes, often caught people off-guard. Lasers, which are devices that generate and amplify coherent light, is an acronym for l ight a mplification by s timulated e mission of r adiation.
Laser have numerous applications.
In manufacturing, lasers are used to weld and drill metals solving numerous problems in the process. For example, in the past, direct heating with a flame was used to weld which took the welder a long time. Lasers help speed up the process. The universal product code, the series of black bars on supermarket items, is read by a helium-neon laser. In the field of medicine, lasers can spot-weld retinas back into their normal place so people can see better.