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Question

A light ray is passing from medium A to B and sin isin r is greater than one. This implies:


A

If light goes from medium A to medium B, it will bend towards the normal.

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B

If light goes from medium A to medium B, it will bend away from the normal.

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C

If light goes from medium A to medium B its speed reduces.

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D

If light goes from medium B to medium A its speed increases.

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Solution

The correct option is A

If light goes from medium A to medium B, it will bend towards the normal.


According to Snell's law:
sin isin r=v1v2.
where v1 = speed of light in medium A,
and v2 = speed of light in medium B.
Hence, if the value is greater than 1, it implies v1>v2.
From the above, we can infer that medium B is denser than medium A. So, if light travels from A to B, it will bend towards the normal.


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