Question

state fermat's principle

Answer 1

In optics, Fermat's principle or the principle of least time, named after French mathematician Pierre deFermat, is the principle that the path taken between two points by a ray of light is the path that can be traversed in the least time. This principle is sometimes taken as the definition of a ray of light.

Answer 2

${\large{\boxed{\underline{\underline{\mathbf{\red{♡Fermat's Principle♡}}}}}}}$.

• Fermat's principle states that the light selects the path which takes the least time to travel.
• It is also applicable to reflection of light.