Electromagnetic waves within the frequency range of 3 kHz to 300 GHz are commonly referred to as what?

Electromagnetic waves that fall within the frequency range of 3 kHz to 300 GHz are classified as radio waves. This classification includes a wide spectrum of frequencies used for various forms of communication, such as AM and FM radio, television broadcasting, and mobile phone transmissions.

Radio waves are characterized by their long wavelengths compared to other types of electromagnetic radiation, which allows them to effectively propagate over vast distances and penetrate through different mediums.

The other choices refer to different portions of the electromagnetic spectrum. Audible-frequency waves pertain to sound frequencies that humans can hear and are not electromagnetic waves. Visible light is the range of wavelengths that we can see, which is much higher in frequency than radio waves. Gamma rays are high-frequency electromagnetic radiation with very short wavelengths, well beyond the radio wave range, and are associated with radioactive decay and high-energy processes.