Medical Physics A

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Across
  1. 6. An object which gives out its own light is ______.
  2. 9. Happens when light bounces from a mirror.
  3. 10. A wave we use for seeing.
  4. 12. Happens when light travels out of one substance into another.
  5. 13. Blue light and green light look ______ when mixed.
  6. 14. Cyan, magenta and yellow are ______ colours of light.
  7. 17. The ______ ray of light has travelled into a new substance.
  8. 18. The ____ ray of light hits a mirror.
Down
  1. 1. Red, green and blue are ______ colours of light.
  2. 2. A triangular ______ can split white light into lots of colours.
  3. 3. An object which reflects light is ______.
  4. 4. The imaginary line at right angles to a surface.
  5. 5. When the three primary colours are mixed they look ______.
  6. 7. A green ______ will only let green light through.
  7. 8. The layer at the back of the eye.
  8. 11. An image which looks sharp is in ______.
  9. 15. The ______ ray of light has bounced from a mirror.
  10. 16. Red light and blue light look ______ when mixed
  11. 19. Does most of the focussing of the eye.