1. Color

2. The Color Spectrum ROY G BiV Black and white Solar Spectrum Colors of Objects Check Question

3. Solar Spectrum

4. Red Orange Yellow Green Blue Violet Frequency and energy wavelength ROY G BiV Roy G Biv

5. Black and White Do not correspond to a particular frequency of light Black is the absence of any color of light White is the presence of all colors of light Why do the edges of this stack of razor blades look black?

6. Colors of Objects Opaque objects are the color they reflect. Transparent objects are color they transmit

7. Check Questions What color would a white T-shirt appear under white, blue and green light? What color would a red T shirt appear under white, red and blue light?

8. Color Addition for Light For transparent materials Rules for Primaries Complementary Colors Examples –Stage lighting –Filters –Televisions and RGB monitors

9. Complementary Colors of Light Two colors of light that when added make white light. Examples: –Cyan + Red –Yellow + Blue –Magenta + Green

10. Rules for Primary Colors of Light Red + Green = Yellow Green + Blue = Cyan Red + Blue = Magenta

11. Color Subtraction Color that results when pigments are mixed. Rules w/ normal pigments Rules w/ primary pigments Complementary Pigments Example: Color Printing

12. Complementary Pigments Two pigments that when combined make black due to the absorption of all colors. Examples –Cyan and Red –Magenta and Green –Yellow and Blue

13. Rules w/ Primary Pigments Primary Pigment ReflectsAbsorbs CyanBlue and GreenRed MagentaRed and BlueGreen YellowGreen and RedBlue

14. Rules w/ normal Pigments ColorReflectsAbsorbs RedR,OY,G,B,V OrangeR,O,YG,B,V YellowO,Y,GR,B,V GreenY,G,BR,O,V BlueG,B,VR,O,Y VioletB,VR,O,Y,G

15. Check Question 2 What color are the lights shining on the above blocks?

16. Scattering Scattering: phenomenon in which light of the natural frequency of a gas is first absorbed and then re-emitted in all directions. Questions a Five Year Old Asks –Why is the sky blue?, Why are sunsets red? –Why are clouds white?, Why are rain clouds dark? –Why is water blue-green in color?