1. Colors in Nature

2. Dispersion of Light in a Prism Colors separate Violet has the highest ƒ (shortest λ), therefore it disperses the most because it interacts the most with the glass molecules. Dispersion- the separation of white light according to its colors (frequencies)

3. The Atmosphere Surrounding the Earth Light travels through millions of meters of nothingness until it starts to encounter the earth’s atmosphere Gas Composition of Earth's atmosphere: Nitrogen -78% of atmosphere Oxygen - 21% of atmosphere Trace gases -1% - Neon, Helium, Hydrogen, Methane, Carbon Dioxide

4. What happens to sunlight when it first encounters Nitrogen and Oxygen molecules

5. The Surface of the Moon (where there is no atmosphere)

6. Scattering of Light by Molecules (Why the Sky is Blue) Nitrogen and Oxygen are relatively small molecules. The lower frequencies of light (red, orange, yellow) are not affected by the tiny molecules. Violet gets scattered the most, indigo next and then blue. Our eyes are more sensitive to blue, so we see the sky as being blue, not violet.

7. Why are Sunsets and Sunrises Orangish- Red?

8. How are Rainbows Formed? Recall: Dispersion 2 Conditions needed for a rainbow 1) Sun in one part of the sky 2) Rain in another part of the sky ….and You in Between!

10. According to one unknown child……….

11. COLORCOLOR The Color Spectrum… All color is a derivative of white light!!

12. Vocabulary Dye – a molecule that absorbs certain wavelengths of light and transmits or reflects other. Pigment – (like dye only larger) is a colored material that absorbs certain colors and transmits or reflects others

13. Color vs. Pigment Color by  Addition (Light) Add all colors of light… get white  Subtraction (Pigment) Dye absorbs certain wavelengths… That is to say it “subtracts” them Add dye… subtract color

14. Primary Colors Primary Colors – They lied!  RED  GREEN  BLUE Secondary Colors  Cyan  Magenta  Yellow

15. Primary Pigments  Cyan  Magenta  Yellow Secondary Pigments  RED  GREEN  BLUE

16. Homework Read 28.1 – 28.6 Complete Page 12 of Packet.  (Do NOT do # 26)