Adding infomation to waves-P6

(notes taken from the CGP revision guides)

• Information is converted into signals.
• Infomation is being transmitted everywhere all the time.
• Whatever kind of information you're sending is converted into electrical signals before it's transmitted.
• It's then sent long distances down telephone wires or carried on EM waves.
• There are two ways you can send information as waves- AM and FM.
• AM Radio Waves have varying amplitude.
• An AM radio transmitter sends out continuous carrier wave.
• The signal is superimposed on the carrier wave using amplitude modulation.
• AM-Amplitude Modulation: The sound wave from the music 'modulates' or changes…