Graphics Programs Reference
In-Depth Information
Exactly the same thing happens with stars: they emit varying wavelengths of light
according to the heat being generated at their core. Our own sun very helpfully gen-
erates light that comes from the white part of the light emission spectrum although
we of course perceive it as leaning towards yellow due to its complex interaction with
our atmosphere.
For the purpose of keeping our discussion as simple as possible though (given that
our eyes and brains also do a lot of perceptual filtering behind the scenes), we will
work here with the assumption that light coming from our sun is for all intents and
purposes white. This gives us a nice base point from which to understand how we
see colored objects in the world around us. To help open up our understanding, we
will essentially step through some aspects of the process regarding what happens
when white light falls on or strikes the surface of a real-world object.
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