Question

fermat's principle explain

Answer 1

In 1650, Fermat discovered a way toexplain reflection and refraction as the consequence of one single principle. It is called the principle of least time orFermat's principle. ... Since the speed of light is the same everywhere along all possible paths, the shortest path requires the shortest time.

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Answer 2

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

• 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.