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Question

In which of the following cases light bends towards the normal?

A
Light travelling from air into glass
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B
Light travelling from the glass into air
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C
Light travelling from air into the vacuum
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D
Light travelling from air into a glass slab
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Solution

The correct option is D Light travelling from air into a glass slab
If light enters any substance with a higher refractive index (such as from air into glass) the light bends towards the normal.
Light bends towards the normal when it passes through a rarer medium to a denser medium.

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