is a specific kind of: spectrum.

has as a part: radio frequency | ELF, extremely low frequency | very low frequency, VLF | LF, low frequency | medium frequency, MF | HF, high frequency | very high frequency, VHF | UHF, ultrahigh frequency | SHF, superhigh frequency | EHF, extremely high frequency | actinic radiation, actinic ray | gamma radiation, gamma ray | infrared spectrum | light, visible light, visible radiation | line | microwave | microwave spectrum | radio-frequency spectrum, radio spectrum | ultraviolet spectrum | color spectrum, visible spectrum ... show more.