Question

Two objects, Object A and Object B, need to be identified. Object A's index of refraction is determined to be 1.77, and Object B's index of refraction is determined to be 1.333. Knowing this information, which of the following must be true?

A. Light can pass through Object B faster than it can pass through Object A.
B. The optical density of Object A is lower than the optical density of Object B.
C. The optical density of Object B is higher than the optical density of Object A.
D. Light can pass through Object A faster than it can pass through Object B.

Answer 1

I think the correct answer would be C. Knowing the index of refraction then we can say that the optical density of Object B is higher than the optical density of Object A. The higher the index of refraction, then the light bends more towards the normal direction.

Answer 2

Answer: The correct answer is Option A.

Explanation: Optical density of a media determines the amount of light which  is slowed down when it is passes through a medium.

Refractive index is the measurement of optical density.

$\text{Refractive Index}\propto \text{Optical density}$

More the refractive index, more will be the optical density.

We are given that refractive index of Object A is 1.77 and refractive index of Object B is 1.333.

Optical density of Object A will be more than the optical density of Object B.

And light can pass easily through Object B because it is less dense than Object A.

Hence, the correct answer is option A.