Huygens’ Principle 1. Statement of Huygens’ Principle Statement 1: Every point on a wave-front acts as a source of secondary wavelets that spread out in all directions with the speed of light in that medium. Statement 2: The forward envelope (common tangent surface) of these secondary wavelets at any later instant gives the new wave-front … Continue reading Huygens’ Principle – Class 12 Physics (CBSE)