フェルマーの原理ふぇるまのげんり

expression, noun

Fermat's principle

In physics, the principle that light travels between two points along the path that takes the least time.

• フェルマーの原げん理りは光こう学がくの基き礎そをなす。

  Fermat's principle forms the basis of optics.

• 光ひかりの屈くっ折せつはフェルマーの原げん理りで説せつ明めいできる。

  Refraction of light can be explained by Fermat's principle.