Chap27_Color - to a reduced ability to distinguish colors...

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Chapter 27 Color
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Spectrum of Visible Light
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Red Photon Blue Photon Green Photon Yellow Photon Prism Spectrum Particles of light, called photons, have a wavelength.
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Additive Color Wheel Spectral Colors Not in the spectrum. How do we see these? R Y B G M C Red Yellow Green Cyan Blue Magenta
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Adding Colored Lights Stream of red & green photons looks the same as yellow photons or YELLOW Eye to Brain Notice overlap of red , green , and blue is seen as white white light.
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Complementary Colors Red + Blue = Magenta Red + Green = Yellow Blue + Green = Cyan Magenta = opposite of Green Yellow = opposite of Blue Cyan = opposite of Red Add a primary color with its opposite and you get: White.
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Negative After-image Stare, unfocused, at the red cross for 10 seconds then look at a white wall.
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Negative After-image Cyan
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Negative After-image
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Negative After-image Cyan Magenta Yellow
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Color Blindness 29 or 70? 21 or 74? Weakness or absence of one of the three types of cones is the cause of color blindness, leading
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Unformatted text preview: to a reduced ability to distinguish colors. Spectral (Color) Reflectance When white light shines on an object, some photons absorbed, others reflected by the object’s surface. White Red Why the Sky is Blue Why Sunsets are Red Name the Color White Red Dark Brown BLUE GREEN RED 0% 100% BLUE GREEN RED BLUE GREEN RED Name the Color Bluish Green Bright Yellow Blue (Cobalt) BLUE GREEN RED 0% 100% BLUE GREEN RED BLUE GREEN RED Subtractive Color Absorbing filters or absorbing pigments remove colors from white light. Check: Yellow = Red + Green Cyan = Blue + Green Yellow & Cyan filters (or pigments) combine to give … Overlapping color filters Check A soap film absorbs red, green, or blue light, depending on the film’s thickness. What colors do we see where red is removed? Where green is removed? Where blue is removed?...
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This note was uploaded on 04/29/2010 for the course PHYS 100 taught by Professor Nidhalguessoum during the Spring '10 term at American University of Sharjah.

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Chap27_Color - to a reduced ability to distinguish colors...

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