puzzle 4

Refraction of light

Across

1. Centre of the sphere
2. works with the principle of total internal reflection

Down

1. bending of light ray except when it is incident on normal
2. line drawn from the centre of curvature
3. mid point of the sphere
4. Length between pole and focus
5. line joining through centre of curvature and pole
6. speed of light is high
7. speed of light is low
8. example of total internal reflection

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Answers