Question

why does light always travel in a straight line?​

Answer 1

Answer:

Light, like everything else, moves at a constant velocity (same speed and, more importantly for this question, same direction) unless a force acts upon it (that is, it takes a force to accelerate it). Thus, in theory under no force, light would move in a straight line.

hope it helps you

Answer 2

Explanation:

light travels in constantly