Question

Let us take three pieces of cardboard. Place them one on the to
make a hole in the middle of each cardboard by using a thickn
on the table at a short distance away from each other. Take a
same height as the holes in the cards. Light the candle and plas
We see that the light of candle is visible only when the home
line. If we disturb them the light of candle disappears.​

Answer 1

Answer:

it show that light travel in a straight line