Before radar, it was difficult to determine where, position-wise, an enemy was located. Surprise attacks which lead to great loss of lives and money was common. However, the invention of radar eliminated this problem. Robots, again, were key in daily lives and war-time atmospheres. 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.