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- 1The 'low notes' have a low frequency and a long wavelength.The 'high notes' have a high frequency and a short wavelength.
- 2when i say "wave", you might think of a wave on the sea. it's obvious what's going on - the surface of the sea is vibrating up and down.With a sound wave, it's the air particles that are vibrating
- 3So they don't need air in order to travel. They don't need anything to be there at all.UHF stands for "Ultra High Frequency", and has wavelengths of less than a metre. It's used for Police radio communications, television transmissions and military aircraft radios - although military communications are now mostly digital.
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- GCSE physics Fichas sobre Sin título, creado por MIRREN el 13/05/2014.
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- MIRREN · may 2014
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- 19 feb 2016
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