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2. X-rays

  • to look inside objects
  • to sterilise food
  • to disinfect water
  • in cooking

3. Microwaves

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

4. Infrared radiation

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

5. Radio waves are used to

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


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