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| Basic Concepts | Reflection and Refraction | Lenses | Fiber Optics |
| What is Light? | Light as a Wave | Light as a Particle | Characteristics of a Photon |
| The Photoelectric Effect | The Transverse Electromagnetic Wave (TEM) |

Optics: Basic Concepts

Just what is light, and how does it behave? What is it made of? Why does it do this or that?

We still don't have all the answers, and there is still some argument over the specific nature and behavior of light. Some of the material in this section is based on observed fact and experimental evidence. But there are some factors that cannot be measured or observed with today's technology. In these cases, I include what I believe to be the correct description (and give my reasons for it), but also indicate that the jury is still out, and we have no actual, demonstrable proof as yet.

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