Light travels in a straight line rectilinear propagation of light This statement does hold if the me...........

General Science (CDS) Physics

Light travels in a straight line (rectilinear propagation of light). This statement does hold if the medium of travel for light is

of variable refractive index

made up of slabs of different refractive indices

homogeneous and transparent

inhomogeneous and transparent

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Explanation:

In vacuum and in homogeneous, transparent media, such as air, water, and glass, light moves in a straight line. When light encounters a boundary between two different transparent media, some light is reflected and some moves from the first into the second medium.