Question

How can we show that light travels in straight lines level class7?

Answer 1

1 ) Take 3 or 4 cardboards and make a hole in each cardboard. See snap how can you make a hole in a cardboard

2) Place cardboard in a straight line and a candle at the one end of the cardboard as shown in figure in snap...

3) Now See trough the hole You will see the light coming from candle , and when see down the hole and try to see the candle , you wont able to see..This shows that light travels in a straight li e..