If you break the word "photography" down into its basic parts, it pretty much defines itself. Photography literally means "drawing with light."
I have created another bad animation to attempt to illiterate the most basic concept of photography.
© Nic Neufeld/Photo Basics
What is happening in this animation is relatively simple. Photons (light) are emitted from a light source. In this case, it happens to be the sun but it isn't always.
After leaving the source, the photons then strike surfaces. "Dark" surfaces absorb more photons than "light" surfaces. The light surfaces reflect light and it then makes its way to our eyes (or our camera).
Strangely, photons act both like particles and like waves. That means photons with different wavelengths are interpreted by our eyes to be different colors. So, when photons are reflected from a blue surface, we see them as blue. I'm not a scientist so I don't think I'm explaining this as well as I otherwise could...but as long as you get the basic idea.
If you'd like to know more, forget what your teachers told you, Wikipedia is always a good resource.
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