The optical density of turpentine is higher than that of water while its mass density is lower. The figure shows a layer of turpentine floating over water in a container. For which one of the four rays incident on turpentine in the given figure, the path shown is correct?
1. 1
2. 2
3. 3
4. 4
(2) Hint: The bending of the ray of light depends on the refractive indices of the media.
Here, the light ray goes from (optically) rarer medium (air) to optically denser medium (turpentine), then it bends towards the normal i.e., i>r whereas when it goes from to optically denser medium; turpentine to rarer medium; water, then it bends away from the normal i.e., i<r.
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