uses & applications of electromagnetic waves

• uses of radiowaves

  • television
  • radio
• uses of microwaves

  • satellite communications
  • cooking food
• uses of infared

  • eletrical heaters
  • cooking food
  • infared cameras
• use of visible light

  fibre optic communications
• uses of ultraviolet

  • energy efficient lamps
  • sun tanning
• uses of x-rays & gamma rays

  • medical imaging
  • medical treatments
• how do electrical signals in a transmitter produce a signal in the receiver?

  • eletrical current in the transmitter produce radiowaves
  • radiowaves are absorbed by the receiever inducing electrical current in the receiver at the same frequency