light and lasers

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  • Created by: itsjannah
  • Created on: 17-05-15 13:07
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  • laser and lights
    • Used to read from the surface of a disic
      • Surface CD is spitted.
  • Pits represent digital signal
    • Laser light is shone cd surface for the digital signal
      • Critical angle
        • Light travels from one material to another= refracted
  • When the critical angle is 90 degrees
    • if the angle  is bigger the light is refracted
  • Endoscopy allows doctors to see through someones body


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