How is radiofrequency energy used?

Probably the most important use for RF energy is in providing telecommunications services. Radio and television broadcasting, cellular telephones, personal communications services (PCS), pagers, cordless telephones, business radio, radio communications for police and fire departments, amateur radio, microwave point-to-point links and satellite communications are just a few of the many telecommunications applications of RF energy. Microwave ovens are a good example of a non-communication use of RF energy.

Radiofrequency radiation, especially at microwave frequencies, can transfer energy to water molecules. High levels of microwaves will generate heat in water-rich materials such as most foods. This efficient absorption of microwave energy via water molecules results in rapid heating throughout an object, thus allowing food to be cooked more quickly in a microwave oven than in a conventional oven.

Other important non-communication uses of RF energy are for radar and for industrial ... more.

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