What is the term for the complete range of radio frequencies used for communication?

The complete range of radio frequencies used for communication is referred to as the spectrum. This term encompasses all the electromagnetic frequencies, including those used for broadcasting, two-way radio communication, cellular networks, and other forms of wireless communication. Understanding the spectrum is essential for telecommunicators as it influences radio coverage, signal quality, and the types of communication equipment that can be effectively used.

Spectrum is divided into different bands (such as VHF, UHF), with each band having specific characteristics and applications. This knowledge is crucial for ensuring efficient communication, proper channel selection, and for managing any interference that might occur between different frequencies.

The other terms listed do not accurately define the complete range of radio frequencies. Amplitude refers to the height of a wave and is related to signal strength, while wavelength describes the physical distance between successive peaks of a wave. Transmission range refers to the distance over which a signal can be effectively transmitted, but again, does not encompass the broader concept of radio frequencies involved in communication. These distinctions highlight why spectrum is the correct answer.