Question

Explain the rectilinear propagation of light with the help of an experiment.

Answer 1

The process by which light travels in a straight line is called Rectilinear Propagation of Light

Experiment

Take a piece of chart paper and roll it like a calendar.

You'll be able to see the other side if you hold one end of the rolled paper to your eye.

However, if you bend the rolled paper and then try to see the other end, you won't be able to do that.

This proves that light travels in a straight path.