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Seeing Color Examples

Seeing Color Examples. 3. White objects appear white because they reflect all the colors of the visible spectrum. Primary Colors of Light.

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Seeing Color Examples

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  1. Seeing Color Examples 3. White objects appear white because they reflect all the colors of the visible spectrum.

  2. Primary Colors of Light Even though the visible spectrum consists of seven different colors, all of the color seen by the human eye is a mixture of the three primary colors: red, green, and blue.

  3. Primary Colors of Light Red, green, and blue are the primary additive colors. When mixed together in different proportions, you can make just about any color. When mixed in equal proportions (added together), the three primary colors yield white light. http://www.micro.magnet.fsu.edu/primer/java/scienceopticsu/light/additive.html

  4. Primary Colors of Light A pigment is a colored material that absorbs some colors and reflects others. The primary pigments are: 1. magenta 2. yellow 3. cyan

  5. Primary Colors of Light Cyan, Magenta, and Yellow are the primary subtractive colors. These colors are combined to produce print media and photographic film. When the subtractive primary colors magenta, cyan, and yellow are added together, they form the color black. http://www.micro.magnet.fsu.edu/primer/java/scienceopticsu/light/subtractive.html

  6. HOW THE HUMAN EYE SEES COLOR Color blindness occurs because one or more sets of cones do not function correctly. Try these tests. http://colorvisiontesting.com/ishihara.htm#plate with 10

  7. Eye correctly focusing on the retina

  8. Nearsightedness • Eyeball is too long or the cornea bulges • Image is focuses before it reaches the retina • Corrected with concave lenses

  9. Nearsightedness Incorrect Focal point Correct Focal point

  10. Farsightedness • Eyeball is too short • Image is focuses behind the retina • Corrected with convex lenses

  11. Farsightedness focused incorrectly focused correctly

  12. Farsightedness

  13. Farsightedness

  14. Prisms & Rainbows • Prisms: Separates white light into its component colors. The longer the wavelength, the less it will be bent by the prism. • Rainbows- light shining thru tiny droplets of water, each droplet acts as a prism

  15. Interactions of Waves • Refraction – The bending of a wave due to the wave moving from one type of medium into another. 1. As light rays enter a new • medium the cause light to bend • 2. The denser the medium – • the slower the light travels

  16. Interactions of Waves Reflection – Bounce back wave • –Angle of Incidence is the angle of the wave coming into the object reflecting the wave. • –Angle of Reflection is the angle bouncing off and going away from the object

  17. Interactions of Waves •Diffraction – Wave passing a barrier or going through a hole in a barrier bends and causes the wave to wrap around the

  18. Astigmatism • Surface of the cornea is curved unevenly • Image is not focused in the right place • Corrected with a combination of lenses

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