Question

Light travels at a constant finite speed of _________ .

Answer 1

1. Light is a form of energy that produces the sensation of vision in our eyes.
2. Light always travels in a straight line.
3. Speed of light in a vacuum is $3\times {10}^8\raisebox{1ex}{$m$}\!\left/ \!\raisebox{-1ex}{$s$}\right.$.
4. Light does not require any medium to travel.

Hence, light travels at a constant finite speed of $3\times {10}^8\raisebox{1ex}{$m$}\!\left/ \!\raisebox{-1ex}{$s$}\right.$.