Tag: reflection

Fermat’s Principle, a lecture in optics

Optics series lecture, Lecture-III “Geometrical Optics and Fermat’s Principle”. Geometric Optics: When the size of objects that a wave of light interacts with are large compared to the wavelength of light λ, λ can be neglected for practical purposes and the light waves behave like rays of light. Rays of light are geometric line segments…

February 25, 2017

Fermat’s Principle, a lecture in optics