Wednesday, February 13, 2013

Mixing Light

When you mix all the colours of paint you get brown or black. Yuck!  But with light you get WHITE!!!  I did a demonstration that shows how light wavelengths combine to form the colours we see based on the same three colours you can see if you look closely at your TV pixels: red, blue, and green.  (Not red blue, and yellow like paint!)
Paint colour wheel
Films overlapping are like paint ... but when you use lights ...


Additive properties of light

Red, Blue, Green spotlights
Imagine that the pink background is more white and now notice the yellow, magenta and cyan shadows!

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