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    <pre style="white-space:pre-line"><code>9. Dispersion of Light                                                   eLearn.Punjab

Activity 9.1              Animation 9.3: Total Internal Refraction
                        Source and Credit: The University of Sydney

                                                   Effect of Refraction

You will need:
â€¢	 a plate
â€¢	 water
â€¢	 a coin
Procedure
1. Take a short, opaque plate and place a coin at its bottom.
2. Position yourself in such a way that the coin is just not visible to you.
3. Ask your partner to pour water into the plate until you can see the coin clearly.
What happens?
When the coin is not visible to you, the rays of light travelling from the coin in a straight line are
not able to enter your eyes. These rays are blocked by the edge of the plate. As soon as water is
poured in the plate, the change of medium occurs. Now light has to travel from water into air. Due
to refraction of light it bends and enters your eyes. The coin is now visible to you due to refraction.

                        4</code></pre>
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