Fermat's Principle
The principle, put forth by P. de Fermat, that states the path taken by a ray of light between any two points in a system is always the path that takes the least time.
See also: Light Ray.
The principle, put forth by P. de Fermat, that states the path taken by a ray of light between any two points in a system is always the path that takes the least time.
See also: Light Ray.