Question

1. Out of air and glass, which is optically rarer ? Give reason
2. What do you understand by refraction of light
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Answer 1

2.Refraction is the bending of a wave when it enters a medium where its speed is different. The refraction of light when it passes from a fast medium to a slow medium bends the light ray toward the normal to the boundary between the two media.

Answer 2

Answer:

1. air is called optically rarer medium because speed of light is fastest in air.

2. It is bending of light when it goes from one medium to another medium.

Explanation:

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