Question

The optical density of turpentine is higher than that of water while its mass density is lower. Figure shows a layer of turpentine floating over water in a container. For which one of the four rays incident on turpentine in figure, the path shown is correct?

Options

• 1

• 2

• 3

• 4

Answer 1

2

Explanation:

Here, light ray goes from (optically) rarer medium air to optically denser medium turpentine, then it bends towards the normal, i.e., θ1 > θ2 whereas when it goes from optically denser medium turpentine to rarer medium water, then it bends away the normal.