Question

Why light takes the quickest path?

Answer 1

Step 1: Light

1. Light is an energy type that allows us to perceive things. Light originates from a source and reflects from objects, which our eyes see, and our brain analyses this signal, allowing us to see.

Step 2: Fermat’s theorem

1. Fermat's law tells that, the light travels between two points in the path that can be completed in the shortest time period.
2. When light enters a new medium, it bends because it is still on the quickest path.