Electromagnetic Waves

 

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Electromagnetic Spectrum

Dangers of Electromagnetic waves

Microwaves:

  • Internal body heating
  • Microwave ovens have shielding to prevent the waves reaching the user.

Infrared:

  • Burns Skin
  • Protect using insulating materials to reduce amount of IR reaching skin

Ultraviolet:

  • Damages surface cells
  • Blindness
  • Suncrean with UV filters
  • Stay out of strong sunlight
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Electromagnetic spectrum

Gamma:

  • Cell Mutation
  • Tissue damage
  • Cancer
  • keep radioactive source of gamma in lead-lined boxes
  • Montior exposure
  • Very short exposure time

Uses of Electromagnetic Waves

Radio waves:

  • Communications
  • TV and FM radio broadcasting

Microwaves:

  • Communication
  • Satellite TV signals
  • cooking
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Uses of Electromagnetic waves

Infrared:

  • Heating
  • Grills
  • Night-vision equipment

 Ultraviolet:

  • Fluorescent lamps
  • Tanning machines

X-rays:

  • X-ray images

Gamma:

  • Sterlising medical equipment
  • Sterlising food

 

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Uses of Electromagnetic Waves

 

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