"First we receive the light, then we impart it. Thus we repair the world."
~ Kaballah
"Turn your face to the sun and the shadows fall behind you."
~Maori Proverb
Frequency of electron's oscillation in a hydrogen atom. Atoms as sources of visible light.
Ray model of light. Reflection. The Law of reflection. Diffuse and specular reflection.
Refraction. Index of refraction. Snell's Law. Total internal reflection.
Fermat's Principle of least time. Principle of reciprocity for light.
Images in plane mirrors. Spherical mirrors. Concave and convex mirrors. Focal point and focal length in spherical mirrors. Mirror equation.
Change of wavelength for refracted light.