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
Answer is Right!
Answer is Wrong!
This question was previously asked in
UPSC CDS-2 – 2016
Rectilinear propagation of light, or the principle that light travels in straight lines, is a fundamental concept in ray optics and holds true when the medium is uniform and has a constant optical density (homogeneous) and allows light to pass through (transparent).