A Short Radio Wave

What is Microwaves?

Microwaves is a short radio wave. It varies from .03937 inch to 1 foot ( 1 millimeter to centimeters) in length. Microwaves travel in straight lines. Like light waves, they may be reflected and concentrated. But they pass easily through rain, smoke, and fog, which block light waves. They can also pass through the ionosphere, which surrounds the earth and block or reflects longer radio waves. Thus, microwaves are well suited for long-distance, satellite, and space communications and for control of navigation.

Microwaves first came to public notice through the use of radar in World War II (1939-1945). Today, many satellite communications systems use microwaves. In TV, microwaves transmission sends programs from pickup cameras in the field to the TV transmitter. These programs can then be sent via satellite to various locations around the world. Microwaves can transmit pictures and printed matter in the process called Ultrafax. They can also cook food in microwave ovens.

Many people use microwaves in their homes. They are the kind of rays that heat food in microwave ovens. Microwaves are also important in communication. They are used like radio waves to carry signals from one place to another. No need to worry, though-these microwaves don't roast birds or burn aircraft that fly to through them. There many kinds of brand of microwave oven. In a developed countries, every household used microwave oven.