Revision:Radio Waves

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Wavelength: 10^-1m to 10⁴m

Sources

Transmitters (using inductance and capacitance), sparks (eg, from brushes of unsuppressed motors).

Detection

Receivers containing inductance and capacitance which are set into resonance by the wave.

Uses

Medium range air-borne communication.

Notes

There are five main classes of radio waves, they are:

1. Ultra High Frequency (UHF) - 10^-1m to 10⁰m - TV, radar, airport control
2. Very High Frequency (VHF) - 10⁰m to 10¹m - FM radio
3. Short Wave Radio (Ultra High Frequency) - 10¹m to 10²m - Amateur radio, police, ambulances
4. Medium Wave Radio (Ultra High Frequency) - 10²m to 10³m - AM radio (national stations)
5. Long Wave Radio (Ultra High Frequency) - 10³m to 10⁴m - AM radio (international stations)

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