How does Bluetooth use EM waves?
Bluetooth devices are low power devices which work over a short distance to link one device to another e.g. from a mobile phone to a hands free headset.
Bluetooth devices have a range of up to 10m.
Uses short wavelength radio signals so does not need line of sight.
Bluetooth uses a system of frequency hopping to reduce interference with WIFI as they use similar frequencies.
Frequency hopping limits data loss.
