An electromagnetic wave having a wavelength between approximately 10 and 100 meters, corresponding to frequencies between 3 and 30 MHz.
Any frequency in this range, especially when used in broadcasting.
Many stations broadcast on shortwaves.
Downward radiation entering the earth's atmosphere that is in the shortwave frequency range.
Having a wavelength of approximately 10 to 100 meters.
Capable of transmitting or receiving signals at such a wavelength.
An electronic device that generates and amplifies a carrier wave, modulates it with a meaningful signal derived from speech, music, TV or other sources, and broadcasts the resulting signal from an antenna.
One who or that which transmits something (in all senses).