Question

A coin is resting on the bottom of an empty container. The container is then filled to the brim three times, each time with a different liquid. An observer (in air) is directly above the coin and looks down at it. With liquid A in the container, the apparent depth of the coin is 7 cm, with liquid B it is 6 cm, and with liquid C it is 5 cm. Rank the indices of refraction of the liquids in descending order (largest first).

a. nA, nB ,nC
b. nA, nC ,nB
c. nC, nA ,nB
d. nC, nB ,nA

Answer 1

Step-by-step explanation:

index of refraction = real depth / apparent depth .

apparent depth is in the denominator so as it decreases , index of refraction increases .

Apparent depth is least for C , so index of refraction of C will be greatest .

So required order largest to least is C , B , A.

d ) is the correct option.