Question

Read the passage and answer the questions:

Let us take three pieces of cardboard. Place them one on the top of one another and make a

hole in the middle of each cardboard by using a thick nail. Erect these cards up on the table at

a short distance away from each other. Take a candle which is of the same height as the holes

in the cards. Light the candle and place it in front of the cards. We see that the light of candle

is visible only when the holes on cards lie in a straight line. If we disturb them the light of

candle disappears.


1.What happens when one card board is shifted a little?


2.What does the experiment prove? ​

Answer 1

Answer:

1- when one board is shifted a little then the light is not passed through cardboard

2- This experiment proves that light is emmited in a straight line

Answer 2

Answer:

answer

Explanation:

This experiment shows rectilinear propagation