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2. Ultraviolet radiation

  • to send information along optical fibres
  • to detect forged bank notes
  • to treat cancer
  • for cooking

3. Radio waves are used to

  • to detect security marks using special pens
  • communicate with ships, aeroplanes and satelites
  • short-range communications
  • to look inside objects

4. Infrared radiation

  • in security systems such as burglar alarms
  • in fluorescent lamps
  • in airport sercurity
  • to broadcast radio and TV programmes

5. Microwaves

  • in remote controls
  • to sterilise food and medical equipment
  • in mobile phones, and to communicate with satelites
  • to disinfect water

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