1. 9 TH GRADE SCIENCE CHAPTER 14 B Light and Color

2. Color Color:  Due to reflected light  Reflect all light  White  Reflect no light  Black Filters:  Transparent material that transmits some colors and absorbs others

3. Seeing: The Eye To see you must:  Collect light  Allow light into the eye  Focus light on receptor cells  Change the light into nerve impulses

4. Collecting Light Cornea:  Clear covering of front of eye  Refracts light

5. Allow light into Eye Pupil:  Opening Iris:  Muscle that controls size of pupil

6. Focusing Light Lens  Changes shape as result of ciliary muscle  Focuses light on retina

7. Change Light into Nerve Impulses Retina  Contains rod and cone cells (nerve cells)  Rods  Cones: 3 types  Red  Green  Blue

8. Human Vision YouTube - How The Human Eye Works YouTube - How The Human Eye Works YouTube - Optometry : How Does the Eye See Color? YouTube - Optometry : How Does the Eye See Color?

9. Mixing Colors Pigments  Chemicals that reflect certain colors  Primary pigments  Magenta  Cyan  Yellow Transmitted Colors (light)  Transmitted by light  Primary transmitted colors  Red  Green  Blue

10. Colorblindness Colorblindness is a genetic defect About 8% of men and 0.5% of women are colorblind Cones cannot determine some color differences