Question

State Fermat’s principle ?​

Answer 1

Explanation:

Fermat principle says:

"Given two points in space, light will take the quickest path between them."

Answer 2

Answer:

Fermat's principle, in optics, statement that light traveling between two points seeks a path such that the number of waves (the optical length between the points) is equal, in the first approximation, to that in neighbouring paths.