Q. An observer can see through a small hole on the side of a jar (radius at a point at height of from the bottom (see figure). The hole is at a height of When the jar is filled with a liquid up to a height of the same observer can see the edge at the bottom of the jar. If the refractive index of the liquid , where is an integer, the value of is________.
image

 5397  202 JEE MainJEE Main 2020Ray Optics and Optical Instruments Report Error

Answer: 158

Solution:

image








So integer value of