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Unit 9: Light Page 18
Note that the “rainbow of colors” Imagine you’re a painter. What
that make up our entire visible three colors do you need to make
world only make up a small part of up any color in the universe? (You
all the light zooming around the should be thinking: red, yellow,
countryside. So where do different and blue.)
colors come from?
Here’s a trick question - can you
When you change the wavelength, make the color “yellow” with only
you change the color of the light. If red, green, and blue as your color
you pass a beam white light palette? If you're a scientist, it's
through a glass filled with water not a problem. But if you're an
that’s been dyed red, you’ve now artist, you're in trouble already.
got red light coming out the other
side. The glass of red water is The key is that we would be mixing
your filter. But what happens light, not paint. Mixing the three
when you try to mix the different primary colors of light gives white
colors together? light. If you took three light bulbs
(red, green, and blue) and shined
them on the ceiling, you'd see
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