Radio waves

• Radio Waves

  • Radio waves can be produced by connecting an antenna to a high frequency alternating current (a.c.) power source
  • The oscillation of charge in the a.c. circuit produces radio waves with the same frequency of oscillation
  • These radio waves produce, or can themselves induce oscillations in electrical circuits
• Radio waves are produced by high-frequency alternating currents and induce similar currents when they are received

  • In the transmitting antenna:
  • The charge from the alternating current oscillates up and down the antenna
  • This produces radio waves that can be absorbed by a similar aerial some distance away
  • In a receiving aerial:
  • The metal aerial absorbs the radio waves
  • This creates an alternating current with the same frequency as the transmitted wave