A transparent cube of side `210 mm` contains a small air bubble. Its apparent
Channel: Doubtnut
Date: 2020-08-02

A transparent cube of side `210 mm` contains a small air bubble. Its apparent distance, when viewed from one face of the cube is `100 mm`, and when viewed through opposite face is `40 mm`. What is the actual distance of the bubble from the second face and what is the refractive index of the material of the cube ?