Download - Color Subtraction Example: –Newspapers and the new zip-lock sandwich bags use color subtraction
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• Color Subtraction Example: – Newspapers and the new zip-lock
sandwich bags use color subtraction.
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White
Red
Green
Blue
Yellow
Cyan
Magenta
Primary Colors
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Green
Pure Green
Color AdditionPrimary Green
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Why is the sky blue?Why is the sky blue?
• Nitrogen and Oxygen in our atmosphere scatter high frequencies of light.
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Why are sunsets red?Why are sunsets red?• Red light is scattered the least by our
atmosphere.
• The greatest path of sunlight through the atmosphere is at sunset or sunrise.
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Why are clouds white?Why are clouds white?
• The color of light scattered by clusters of water molecules vary with the size of the clusters.
• The size of clusters of water molecules (droplets) vary in clouds.
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Why is the ocean Why is the ocean greenish blue?greenish blue?
• Red light is absorbed by the molecules in the water.
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Color VisionColor Vision• Colorblindness - about 10% of population• Red-green is predominant• Yellow-blue - a few• Total - some
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• Complementary Colors - any two colors that add together to produce white
• e.g. magenta + green = white
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Optical Illusions
Animation
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