Color and Vision

1. The pupil of the eye is a black object or spot on the surface of the eye.
2. The eye receives upright images.
3. The lens is the only part of the eye responsible for focusing light.
4. The lens forms and image (picture) on the retina. The brain then "looks" at this image and that is how we see.
5. The eye is the only organ for sight; the brain is only for thinking.
6. A white light source, such as an incandescent or fluorescent bulb, produces light made up of only one color.
7. Sunlight is different from other sources of light because it contains no color.
8. When white light passes through a prism, color is added to the light.
9. The rules for mixing color paints and crayons are the same as the rules for mixing colored lights.
10. The primary colors for mixing colored lights are red, blue and yellow.
11. A colored light striking an object produces a shadow behind it that is the same color as the light. For example, when red light strikes an object, a red shadow is formed.
12. The shades of gray in a black and white newspaper picture are produced by using inks with different shades of gray.
13. When white light passes through a colored filter, the filter adds color to the light.
14. The different colors appearing in colored pictures printed in magazines and newspapers are produced by using different inks with all the corresponding colors.
15. The mixing of colored paints and pigments follow the same rules as the mixing of colored lights.
16. The primary colors used by artists (red, yellow and blue) are the same as the primary colors for all color mixing.
17. Color is a property of an object, and is independent of both the illuminating light and the receiver (eye).
18. White light is colorless and clear, enabling you to see the "true" color of an object.
19. When a colored light illuminates a colored object, the color of the light mixes with the color of the object.
20. Naove explanations of visual phenomena involving color perception usually involve only the properties of the object being observed, and do not include the properties of the eye-brain system.