Question

describe an activity to show that light travels in a straight line​

Answer 1

Explanation:

Take a pipe and a lighted candle

Pace it at one end and try to look at the candle through the pipe.You can see the candle.

Now bend the pipe and look at the candle again.You cant see the candle.

This activity shows that light travels in a straight line.

Answer 2

Light a candle and place it on a table. Take two long PVC pipes, one bent and one straight. Observe the candle through the pipes. You will see that the candle only appears when looked through the straight pipe. This proves that light travels in straight lines.