Optics and Waves -- Problem Set #4

Sky-blue sky? For problem #4 on scattering of light by small particles, check out this experiment from the Exploratorium in San Francisco. It uses simple components -- a baking dish or unused aquarium of water, a flashlight, powdered milk -- and it will take you to some real science of scattering of light: that sunsets are red/orange because much of the shorter wavelengths have been diverted to be someone else's blue sky...
http://www.exploratorium.edu/publications/Snackbook/blue_sky/blue_sky.html