Search
Menu
Zurich Instruments AG - Lock-In Amplifiers 4/24 LB
Photonics Dictionary

Fermat's principle

The principle that a light ray extending from one point to another will, after any number of reflections and refractions, follow the path requiring the least transit time. This is also known as the principle of least time.
We use cookies to improve user experience and analyze our website traffic as stated in our Privacy Policy. By using this website, you agree to the use of cookies unless you have disabled them.