also: フェルマーのげんり
Fermat's principle
In physics, the principle that light travels between two points along the path that takes the least time.
フェルマーの原理は光学の基礎をなす。
Fermat's principle forms the basis of optics.
光の屈折はフェルマーの原理で説明できる。
Refraction of light can be explained by Fermat's principle.
Named after the French mathematician Pierre de Fermat. The Japanese term is a direct borrowing of the English 'Fermat's principle'.