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What do you mean by "Rectilinear Propagation" of Light?

1. Light travels in a straight line
2. Light travels in a curved path
3. Light exhibits dual nature of particle and wave
4. Light gets deviated when it moves in another medium

Correct answer: Light travels in a straight line

Solution

Rectilinear propagation means light travels along straight lines in a homogeneous medium. That is why shadows have sharp edges and why light rays are drawn as straight lines in basic optics.

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