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?

• A. $1$
• B. $2$
• C. $3$
• D. $4$

Answer 1

Answer: (B)

$2$

Answer 2

In the figure, the path shown for the ray $2$ is correct. The ray suffers two refractions : At $A$, ray goes from air to turpentine, bending towards normal. At $B$, ray goes from turpentine to water (i.e., from denser to rarer medium), bending away from normal.