electromagnetic spectrum

electromagnetic spectrum

1. radio waves

   • communications, radio, TV

2. microwaves

   • communications satellites, telephony, heating water and food

3. infred

   • detector in security lighting, remote controls (e.g. TV)

4. visabl light

   • Red Orange Yellow Green Blue Indigo Violet
     • seeing, photography, communication (eg in optical fibres), laser surgery

5. ultra violet

   • sun-tan lamp, making ions, making vitamin D, killing bacteria in water treatment plants

6. x-ray

   • imaging breaks/defects in bones, hidden devices

7. gamma rays

   • medical tracers, killing cancerous cells, sterilisation of surgical equipment