An Executive Summary

An Executive Summary - were used to bounce their microwave...

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Wentian Su Com270-007 Prof.Keevan An Executive Summary on "Microwaves" Microwaves is a very useful tool in our daily life. Microwaves are electromagnetic waves with wavelengths ranging from as long as one meter to as short as one millimeter, or equivalently, with frequencies between one gigahertz and 3000 gigahertz. Microwaves travel in straight lines, so they can be aimed in a given direction. They can be reflected by dense objects so that they send back echoes-this is basis for radar. They can be absorbed, with their energy being converted into heat. Three major uses of microwave are Microwaves for radar, High-Speed cooking and telephones without cables. Early radars
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Unformatted text preview: were used to bounce their microwave signal off Nazi bombers. Radar grew more sophisticated and able to detect airplanes, to scan the horizon for enemy ships and to paint finely detailed electronic pictures. High-Speed cooking has been discovered 35 years ago and invented by M.I.T and British scientists. Today, people can use it to cook food and to perform difficult heating or drying jobs. Last, microwaves can pass undistorted through the air- makes them good messengers to carry telephone conversations as well as live television signals....
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