Question

give an example from daily life to prove that light travels in a straight line.

Answer 1

Torch is an example that proves lights travels in a straight line.

It is the best example that proves that light travels in straight line.

You can switch on the torch and point out a particular portion, but you cannot focus vertically or horizontally with a normal torch.

So it proves that light always travels in a straight line.

Answer 2

Torch is the best example without LED that light travels in straight line in our daily life when the switch on the torch we see that light travels in straight line