Question

Define RECTILINEAR PROPAGATION.....
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Answer 1

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>> Rectilinear Propagation :- The phenomenon by which light travels in straight lines, unless it is reflected by a polished surface or the medium of propagation is changed.

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Answer 2

Answer:

Rectilinear propagation describes the tendency of Electromagnetic waves (light) to travel in a straight line. Light only deviates from a straight line when the medium it is travelling through changes density. This is called refraction.