What is the relationship between the wavelength and frequency of a radio wave?

Wavelength and frequency are inversely related: as the frequency of a wave increases, its wavelength decreases, and vice versa. This is because the speed of the wave (the speed of light for radio waves) equals frequency multiplied by wavelength, so if the speed is constant, raising one quantity lowers the other. High-frequency signals have short wavelengths; low-frequency signals have long wavelengths. This relationship matters in radio, where different bands use different frequencies and corresponding wavelengths. Remembering the inverse relationship between frequency and wavelength is common on the signals portion of the Electronics subtest.