What principle did Fresnel express in quantitative terms?
Huygens's principle
Newton's laws of motion
Einstein's theory of relativity
Bohr's atomic model
Answer
Fresnel expressed Huygens's principle of secondary waves in quantitative terms. By doing so, he provided the first satisfactory explanation of diffraction by straight edges and rectilinear propagation.
Shedding Light on Augustin-Jean Fresnel: The Brilliant Mind Behind Modern Optics