Question

why light travels in straight line?

Answer 1

hey buddy here is your answer !!

according to Fermat's principal of light we know that light always takes quickest path to travel between one point to other ..
so think what is the quickest path between one point to other it must be a straight line so that's why ,,,,...

hope this helps u !!!!

Answer 2

Untitled Document. In a dusty atmosphere it is sometimes possible to see light travelling and it does appear to be moving in a straight line. The fact that light travels can be demonstrated by putting an object in its path.