Wireless technology is used
by radio and television,
laptops, mobile phones
Radio waves are reflected and refracted
in the earths atmosphere the amount of
refraction depends on the frequency of the
wave and there is less refraction at high
frequencies
Radio stations
broadcast signals with
a particular frequency
The same frequency can be used by more than one radio
station; the radio stations are two far away from each other to
interfere but in unusual weather conditions the radio waves
can travel further and the broadcasts interfere
Interference is reduced if digital
signals are used