Which of the following correctly depicts the path of a ray passing through a rectangular glass slab?
[0.8 mark]
A
I
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B
II
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C
III
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D
IV
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Solution
The correct option is D IV Glass is an optically denser medium than air. Hence, when a light ray enters the glass slab from air, it bends towards the normal and when it comes out from the slab, it bends away from the normal as shown.