Chapter 14: Light Section 2: Light and Color Colors: determined by wavelength of light an object reflects Objects appear to be white because they reflect all colors of visible light.

Objects appear to be black because they absorb, rather than reflect, all colors of visible light. Filter: transparent material that absorbs all colors except the color or colors it transmits Filters can make objects appear to be different colors.

Seeing color: light enters the eye and is focused on the retina. Retina: made up of two types of cells that absorb light Cones: distinguish colors and detailed shapes; most effective in daytime vision Rods: sensitive to dim light; most effective in nighttime vision

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2. Color blindness: results when one or more sets of cones do not function properly. Mixing Colors 1. Pigment: colored material that absorbs some colors and reflects others 2. Primary colors of light: red, green, and blue

3. Primary colors of pigment: magenta, cyan, and yellow 4. Primary colors of light are additive colors: combine to form white 5. Primary colors of pigments are subtractive colors: combine to form black, the absence of reflected light

Primary Pigment Colors Primary Light Colors http://mcat-review.org/primary-pigments.gif http://quezi.com/wp-content/uploads/2009/03/primary-colors.jpg