Concepts of Physics

IIT JEE Physics (1978-2018: 41 Years) Topic-wise Complete Solutions

Refraction Through a Glass of Water


To see refraction through a glass of water.


a glass of water, stiff sheet of paper to make slits, screen



Cut two slits on a stiff piece of paper. Make it stand by fixing it over a window on one side of a cardboard box. Remove the opposite side of the box and let sunlight or torchlight fall on the slits to create `rays'. Place a cylindrical tumbler filled with water in the path of the rays. You will find that the direction of the rays change after refraction. We use the refraction at a curved surface to make lenses.