What is the typical frequency range for shortwave radio?

The typical frequency range for shortwave radio encompasses between 3 MHz and 30 MHz. This range is significant because it allows radio waves to propagate over long distances, particularly due to the ability of these wavelengths to reflect off the ionosphere. This reflection enables transmissions to be received beyond the horizon, which is why shortwave radio is widely used for international broadcasting and communication, especially in remote areas.

The ranges defined in the other options represent different segments of the radio frequency spectrum. Frequencies below 3 MHz are more associated with medium wave and lower frequency bands, while frequencies from 30 MHz to 300 MHz fall within the VHF (Very High Frequency) band, used for FM radio, television, and other forms of communication. Frequencies from 300 MHz to 3 GHz are classified as UHF (Ultra High Frequency), which is utilized for television broadcasts, mobile phones, and Wi-Fi signals. Thus, the range of 3 MHz to 30 MHz distinctly defines the shortwave band, illustrating its unique capabilities for long-range communication.