Radio frequencies are designated in units of:

Radio frequencies are designated in units of:

• A. Megahertz
• B. Hertz
• C. Gigahertz
• D. Terahertz

Answer: (A)

Radio frequencies are expressed using scaled units of the hertz to keep numbers manageable. In most radio communication contexts, the frequencies fall into the millions of cycles per second, so megahertz (MHz) is the common designation. Using hertz would yield unwieldy numbers, and gigahertz or terahertz cover much higher bands (microwave and beyond) that aren’t typical for everyday radio channels such as those used in public safety. Therefore, megahertz is the standard and most appropriate unit for labeling radio frequencies in this context.

Radio frequencies are expressed using scaled units of the hertz to keep numbers manageable. In most radio communication contexts, the frequencies fall into the millions of cycles per second, so megahertz (MHz) is the common designation. Using hertz would yield unwieldy numbers, and gigahertz or terahertz cover much higher bands (microwave and beyond) that aren’t typical for everyday radio channels such as those used in public safety. Therefore, megahertz is the standard and most appropriate unit for labeling radio frequencies in this context.