If an observer sees the bottom of the vessel shown in Figure., at 8cm, find the refractive index of the medium in which the observer is present.

An observer can see through a small hole on the side of a jar (radius 15 cm) at a point at height of 15 cm from the bottom (see figure). The hole is at a height of 45 cm. When the jar is filled with a liquid up to a height of 30 cm the same observer can see the edge at the bottom of the jar. If the refractive index of the liquid is N//100 , where N is an integer, the value of N is ___________.

An observer can see through a small hole on the side of a jar (radius 15 cm) at a point at height of 15 cm from the bottom (see figure). The hole is at a height of 45 cm. When the jar is filled with a liquid up to a height of 30 cm the same observer can see the edge at the bottom of the jar. If the refractive index of the liquid is N//100 , where N is an integer, the value of N is ___________.

For which medium is refractive index minimum ?

For which medium is refractive index maximum ?

A light ray enters from medium A to medium B as shown in Figure. The refractive index of medium A relative to B will be

A light ray enters from medium A to medium B as shown in Figure. The refractive index of medium A relative to B will be

If speed of light in a medium is 2xx10^8m//sec . Find refractive index of medium.

A transparent ball of radius R is viewed by an observe O along its diameter AB. The observe O sees the distance AB to be infinitely large. Find the refractive index of the material of the ball.