So, how does it work? Let’s take a radio programme as an
example. Firstly, in the studio the voices and music are turned
into electronic signals, called ‘voice waves’. Next, they are made
stronger by passing them through an amplifier. These stronger
waves are called ‘carrier waves’ and they are passed to large
aerials. Then the aerials send out these waves, which are now
called 'radio waves'. These are subsequently picked up by a
receiving aerial, in this case, the one on your radio. After this, the
radio waves go through a reverse process. They are first turned
back into voice waves, then passed through another amplifier,
and finally sent out through speakers or headphones. The result
is your favourite music or the latest news!