What are microwaves?
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Microwaves are widely used to transmit television signals to and from orbiting satellites in space, and they are also the basis on which modern mobile telephones work.
In radar, a beam of microwave energy scans the target area and bounces back signals, producing a picture of the object. Microwaves penetrate the food in a microwave oven, causing the molecules to move about very rapidly. This rapid movement generates the heat that cooks the food.
Radar uses microwave radiation to detect distant objects. The microwaves usually scan round in a circle, and the echoes sent back produce an image on a screen. This can be used for navigation for other purposes.
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Date Added: 13 December '11
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