Electromagnetic Waves(Chapter 13)

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Electromagnetic waves Facts

  1. All electromagnetic waves are transverse waves

  2. Electromagnetic waves are made up of oscillating electric ands magnetic fields. They do not carry charges

  3. All magnetic waves can travel without a medium, with the same speed of 3.0 × 10^8 m/s in a vacuum

  4. The wave speed applies to all electromagnetic waves

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Radio waves uses

  • Radio broadcasting

  • Television communication

  • Astronomy

  • Radio frequency identification tags

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Microwaves uses

  • Mobile phones

  • Microwave open

  • Satellite television

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Infrared

  • Infra-red remote controls

  • Intruder alarms

  • Thermal imaging

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Visible light

  • Photography

  • Optical fibres medicine and telecommunications

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Ultraviolet

  • Sunbeds

  • Bank notes authentication

  • Disinfecting water

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X-rays

  • Medical radiology

  • Security screening

  • Industrial defection

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Gamma rays

  • Sterilising food

  • Detection of cancer and its treatments