1. Unit 3 Light and Optical Systems Topic 6 The Source of Colors Remember to name and date your notes!

2. When white light is refracted into different colors, the resulting pattern is called a spectrum.

3. ROY G BIVROY G BIV

4. When light strikes an object, it can be absorbed, reflected, or refracted (transmitted). Why is an apple red? Why is celery green? Why is your shirt blue?

6. Why does a piece of paper appear white? Why does the ink in a textbook appear black? The white paper reflects all colors, while the black ink absorbs all colors.

7. Additive Primary Colors Red Green Blue -all three working in the right amounts will create white.

8. Secondary Colors -created when two primary colors are put together Yellow Cyan Magenta

9. Mix and Match Colors Additive Colors Color Filters Secondary Colors Light From Dots Color Wheels Try these links!

10. Rods – detect the presence of light. Cones – detect color. There are three types, each responding to a different color. Red, Green, Blue. Signals from these cells travel through the optic nerve and to the brain where the brain determines shape and color.

12. The cone cells in some people’s eyes are unable to detect certain colors. (Ask Mr. Helgren!) This is colorblindness.

13. The individual with normal color vision will see a 5 revealed in the dot pattern. An individual with Red/Green (the most common) color blindness will see a 2 revealed in the dots.

14. Color Blindness Test Color Vision Deficiency Test