Question

А
2) Observer observes the object 'o' kept in the denser
medium from the three positions A, B, C
(a) From which position after viewing apparent depth is
more?
(b) What is the effect on apparent depth for oblique viewing
when refractive index of the medium is increased?​

Answer 1

Apparent depth ∝ 1/ refractive index

Explanation:

We know that observer observes object "o" kept in the denser medium from the three positions: A,B,C. Please find attached the diagram.

(a) Apparent depth = real depth / refractive index

So we find that Real depth ∝ apparent depth

At A, the apparent depth is equal to real depth because the observer is perpendicularly to the point A.

So apparent depth is as follows:

OC > OB > OA

(b) Apparent depth is inversely proportional to the refractive index. So the higher the refractive index of the medium, the lower the apparent depth.

apparent depth ∝ 1/ refractive index

So,  the effect on apparent depth for oblique viewing when refractive index of the medium is increased, the rays will bend from its original path at the boundary of separation of the two media. This process is called refraction.