noun

radio waves used to send radio, television, mobile phone etc signals

noun

the rate at which a sound wave, light wave, or radio wave vibrates (=moves up and down)

noun

the wavelength on which a radio programme is broadcast

noun

a unit for measuring the frequency of sound waves and radio waves

abbreviation

hertz

noun

the part of the Earth’s atmosphere through which radio waves can be sent

abbreviation

kilohertz

noun

a unit for measuring radio waves, containing 1000 hertz. The written abbreviation is kHz.

noun

a radio wave of more than 1,000 metres used for broadcasting. The written abbreviation is LW.

abbreviation

long wave

noun

a range of radio waves between 100 and 1000 metres in length, used for broadcasting

verb

to change the energy level or frequency of a radio wave

abbreviation

medium wave

noun

an electromagnetic wave that radio signals can be sent on

noun

a type of radio wave that is used for broadcasting across large distances

adjective

relating to a spectrum

noun

a range of radio waves or light waves

noun

Ultra High Frequency: a range of radio waves used for broadcasting television programmes

noun

very high frequency: a range of radio waves that produces good sound quality

noun

the way in which sound, light, a radio signal etc travels. It is represented by a line that curves upwards and then downwards again many times.

noun

a range of radio waves that have lengths that come between particular limits