Light

Links concerning the nature and behavior of light.

A comprehensive introduction to the nature of light at Wikipedia.

An excellent lecture on the basic physics of  The Mystery of Light by Walter Lewin of the Massachusetts Institute of Technology.

Almost everything you ever wanted to know about light from Canon Inc.

The speed of light is constant in a vacuum. Always. No matter how fast your flashlight is moving. In this video physicist Brian Greene explains.  Let it sink in, then google the theory of relativity.

In this video Brian Greene explains the famous double slit experiment and the unexpected results it produces.  The video uses electrons in the explanation but photons of light behave exactly the same way. You have just dipped your toe into the world of quantum mechanics.

The nature of light is seriously strange, and here’s some serious discussion of the way that it behaves like a particle under certain circumstances and like a wave under others, and sometimes like both at the same time: The Dual Nature of Light as Reflected in the Nobel Archives.