Radio waves - Waves with wavelengths of up to 10 km, Radio waves - non-ionising waves used to broadcast TV and radio, electromagnetic waves - a group of waves that carry different amounts of energy, frequency - the number of vibrations per second (Hz), parabolic transmitter - device which transmits waves shaped like a parabola, digital signals - are either "on" or "off", attenuate - loose energy, noise - unwanted signals, ionosphere - a region of the atmosphere where ionisation caused by solar radiation affects the transmission of radio waves, 1 KHz - 1000 Hz, 1 MHz - 1x106 Hz, 1 GHz - 1x109 Hz,

p5 wave definitions matchup

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