Question

what is the meaning of the given paragraph.

Answer 1

THE GIVEN PARA MEANS THAT 
a light always travels in a straight or reticulate motion. It never curves or makes ways between the obtects and when a opaque body like human is interefering between then the light makes shadow as it can not pass trough it and then we see our shadow . a single light strand is called a ray and a group of rays together make a flow of light!