Question

give an experiment to show rectilinear propagation of light​

Answer 1

Explanation:

put the cardboard what all the cardboards and a base such that they are in same line. place a candle adjacent to the holes of the boxes you will see that we can see the candle flame only if if the cardboards are in same line this shows that light travels in a straight line thus it is a rectilinear propagation of light.