1. COLOR Chapter 14, Section 4 Pg. 543-545

2. Pigment Colors Mixing color of pigment (i.e.) paints is different than mixing colors of light. Mixing color of pigment (i.e.) paints is different than mixing colors of light. Primary color of pigments Primary color of pigments  Magenta  Yellow  Cyan These colors are mixed to form secondary colors. These colors are mixed to form secondary colors.

4. Seeing Color Your eyes see color using cones in your eye. Your eyes see color using cones in your eye. Your eyes use rods to see in low light situations. Your eyes use rods to see in low light situations. Cones do not work well in low light. Cones do not work well in low light.

5. Colors of light Light also has three primary colors: Light also has three primary colors:  Red  Blue  Green Mixing two of these colors give us secondary colors. Mixing two of these colors give us secondary colors. Mixing all three give us white light. Mixing all three give us white light.

7. From Longest to Shortest λ Red Red Orange Orange Yellow Yellow Green Green Blue Blue Indigo Indigo Violet Violet We use the mnemonic Roy G. Biv to help us remember this.

8. Seeing Colors of Light For opaque (objects you can’t see through) you see the color or colors the object reflects. For opaque (objects you can’t see through) you see the color or colors the object reflects.  Ex: When white light shines on a strawberry all colors of light but red are absorbed. So you see red.

9. Seeing Colors of Light If something appears white all colors of light are reflected. If something appears white all colors of light are reflected. If something appears black all colors of light are absorbed. If something appears black all colors of light are absorbed.

10. Seeing Colors For transparent and translucent objects you see the color of light that is transmitted through the object. For transparent and translucent objects you see the color of light that is transmitted through the object. Ex. If something appears green then only green light is transmitted

11. Optical Illusions An optical illusion is designed to “trick” the eye. An optical illusion is designed to “trick” the eye.

12. Which is darker A or B?

13. They are the same!

14. Rotating Snakes

15. How many colors are there?

16. Pictures with multiple meanings…