Waves in electromagnetic spectrum dangers and uses

• Gamma rays has shorter wavelength, higher frequency and more energy than radiowaves
• Radio wave uses

  • Broadcasting
  • Communication
  • Some satellites use radio waves in transmissions
• Microwave uses

  • Cooking
  • Communicators
  • Satellite transmissions(microwaves can travel through earths atmosphere)
  • Phone signals
• Microwave dangers

  • Damage body cells through heating
• Infrared uses

  • Electric oven/electric heater(when object absorbs infrared radiation tempature increasex)
  • Thermal imaging(infrared camera)
  • Optical fibres
• Infrared dangers

  • Can cause burns
• The dangers of electromagnetic waves increase with frequency
• Visible light uses

  -vision, photography and illumination light
• Ultraviolet uses

  • Flourscent light(energy efficient lamps contain substances that absorb UV rays and emit energy as visible light)
  • Disinfecting water(UV radiation can damage and kill cell)
  • Identifying property(making invisibke mark and shining light on it)
• Ultraviolet dangers

  • Can damage and kill cells
  • Burn human skin and cause it to age
  • Increase risk of skin cancer and damage eyes
• X ray uses

  • Medical imaging(x ray absorbed by bones but pass through tissue)
  • Airport security scanner
• Gamma-rays uses

  • Treat cancer by killing cancer cells
  • Used to sterilize food and medical equipment by killing any microorganisms
• Gamma ray and x-ray dangers

  • Can cause cancer
• Little fibres that carry information as infrared waves(or some use visible light) what is this?


  Optical fibres