Question

demonstrate that light moves a straight line?​

Answer 1

Explanation:

We need to arrange three pieces of cardboards, with holes in each, in an uneven line. The light stops and cannot travel through all three cardboards. When we arrange the holes in a straight line, we can see light. This shows that light travels in a straight line.

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Answer 2

Answer:

Two experiments are used to demonstrate how light travels in straight lines. In the first example, the presenter arranges three pieces of card, with holes in, in an uneven line. The light stops and cannot travel through all three cards. When she arranges the holes in a straight line, the light can travel through.

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Thank and mark as brainliest.