Question

4. What is meant by 'rectilinear propagation of light'?short answer​

Answer 1

answer : it's when all the light beams come together

separate beams of light come together

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Answer 2

Explanation:

Rectilinear propagation of light explains a lot of phenomena associated with light. One such phenomenon is the formation of shadows. When you shine a torch in a dark room, you can see a beam of Word help light. If you place a globe infront of a lit candle, a shadow can be Rectilinear consisting or seen on the wall.