Transmission, Absorption, ReflectionIt depends on the material and the wavelength

Interference

http://www.youtube.com/watch?v=BH0NfVUTWG4Diffraction:http://www.youtube.com/watch?v=Iuv6hY6zsd0

Interference

Is Light Made of Waves?

Young’s Double Slit Experiment

Arago/Fresnel/Poisson Spot

Evidence that light is a particle:It doesn’t require a medium:

Michelson-Morley Experiment