The picture describes HuygensPrinciple in Chinese. Author: J. S. Liang (self-made) Date of Creation: June 25, 2005 This file is licensed under the Creative
the original found at https://commons.wikimedia.org/wiki/File:Huygens_Fresnel_Principle.gif This file is licensed under the Creative Commons Attribution-Share
DescriptionHuygens Fresnel Principle.gif English: Huygens[1] proposed that every point to which a luminous disturbance reaches becomes a source of a spherical