Question

Describe an activity to show that light travels along a straight line​

Answer 1

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Aim: To show that lights travels in straight line.

Material Required: A lighted candle and a flexible tube.

Procedure: Take a flexible tube and place a lighted candle in front of one end of it. Place your eyes at the other end of the tube. Can you see the light clearly? Yes.

Now, bend the tube a bit. Place your eyes at the other end of the Tube. Try to locate the candle light. Can you see something or its appears dark? No. This shows that light travels in staright line, that is why, you see it clearly through a straight tube.

Note:

Attachment 1 : Clearly explained diagram $.$