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- Shortwave radio
Radio broadcasting using radiowaves with wavelengths between 10 to 100 meters, and frequencies between 3 to 30 megahertz
Shortwave radio is radio transmission using radio frequencies in the shortwave bands (SW). There is no official definition of the band range, but it always includes all of the high frequency band (HF), which extends from 3 to 30 MHz (100 to 10 meters); above the medium frequency band (MF), to the bottom of the VHF band. Radio waves in the shortwave band can be reflected or refracted from a layer o... Wikipedia
