Q-1 What do you mean by rectilinear propagation of light?
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Rectilinear propagation describes the tendency of Electromagnetic waves (light) to travel in a staight line. Light only deviates from a straight line when the medium it is travelling through changes density.
➮ A light is set up behind the cardboard. The light appears through all three holes from the other side.
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Answer:
Rectilinear propagation of light shows that light travels in straight line.
Explanation:
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