Refraction

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					                     Refraction
Learning Objective:
Investigate how light rays can be bent.

  Starter Activity: Copy

When light rays enter
and leave different
substances they are bent.
This is called refraction.
           A Trick Question
Ben put a coin in a mug and moved back so
 he could not see it. His friend Martin poured
 some water into the cup and suddenly Ben
 could see the coin again without moving.
 Why could Ben now see the coin?
The light had been refracted by the
               water:
        Investigation
air   glass   normal    ray box
                  Conclusion
Look at the lines you have drawn on your paper,
  then complete these sentences.
• I noticed that the ray of light is refracted (away
  from/towards) the normal when it goes into a
  glass block.
• The ray of light is refracted (away from/towards)
  the normal when it comes out of a glass block.
• The ray coming out of the glass block is
  (parallel/at right angles) to the ray going into the
  block.

				
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posted:1/30/2013
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