Treatise on light : $b In which are explained the causes of that which occurs in reflexion, & in refraction and particularly in the strange refraction of Iceland crystal

Name: Treatise on light : $b In which are explained the causes of that which occurs in reflexion, & in refraction and particularly in the strange refraction of Iceland crystal
Author: Christiaan Huygens

Christiaan Huygens · 1695

Why the incident and reflected rays are in the same plane perpendicular to the reflecting surface. That it is not needful for the reflecting surface to be perfectly flat to attain equality of the angles of incidence and reflexion.…

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