A ray of light travelling from a medium $X$ enters obliquely into another medium $Y$ . If it bends away from normal, then which one of the two is relatively optically denser?

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X

Y

Both

X

and

Y

None of these

answer is A.

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Detailed Solution

A ray of light travelling from a medium

X

enters obliquely into another medium

Y

. If it bends away from normal, then

X

is relatively optically denser.
We see that if a ray of light passes from a denser medium to a rarer medium, it is inclined away from its normal. Therefore, medium

X

is optically denser than medium

Y

because when a ray of light travels from medium

X

Y

, it is bent away from the normal.

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