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Television and radio waves

airwaves

noun

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

frequency

noun

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

frequency

noun

the wavelength on which a radio programme is broadcast

hertz

noun

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

Hz

abbreviation

hertz

the ionosphere

noun

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

kHz

abbreviation

kilohertz

kilohertz

noun

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

long wave

noun

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

LW

abbreviation

long wave

medium wave

noun

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

modulate

verb

to change the energy level or frequency of a radio wave

MW

abbreviation

medium wave

radio wave

noun

an electromagnetic wave that radio signals can be sent on

short wave

noun

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

spectral

adjective

relating to a spectrum

spectrum

noun

a range of radio waves or light waves

UHF

noun

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

VHF

noun

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

wave

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.

waveband

noun

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

pre-cation

a paid holiday given to a new employee before they start their job

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