Friday, May 21, 2004

How do we perceive light?

Some simple explanations on how primary colours "combine" and light waves are perceived by our eyes. Also contains this nice point:

People sometimes speculate about extraterrestrials picking up TV signals from Earth and watching our soap operas. But what is transmitted is so finely tuned to the peculiarities of the human ocular and perceptual system that aliens would struggle to make any sense of it.

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