What do we mean by rectilinear propagation of light?

Light travels in a straight line.

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Light is opaque.

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Light travels in curved lines.

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Light travels in circular paths.

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Solution

The correct option is A Light travels in a straight line.
Light moves from place to place through rectilinear propagation. Rectilinear is a fancy word for straight. Light travels from the source in a straight line.

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