Test 2 News

1. Test 2 News • Keep your Tests in your notebook but return your Scantron forms and the Manipulative. • Some of the questions will appear on the comprehensive final. • Discuss questions that you missed with your team mates.

2. The Plan • Locate your name tag. • Remove the team role name and leave it on the desk in front of you. • Leave the team name sign on the desk as well. • Get ready to move…

3. Remember Attendance Sheets EGR Hands-on COM Recorder + Chalkboard XO Gathers Supplies CO Speaks for the Team + Attendance

4. Chapter 14 & 15 Light and Color

5. “Inside My Eye” Supplement

7. Parts of the Human Eye(Supplement Handout) • Cornea – bends light • Iris – controls the amount of light • Pupil - opening • Lens – focuses light onto retina • Retina – back of eye • Fovea – center of your vision • Optic Nerve – “signal wire” (causes blind spot) Blind Spot Demo (Page 265) O X

8. Rods - brightness receptors • Cones - color receptors • Three Types: Red, Green, Blue • Cones are more numerous in the center of your vision. • Rods are more numerous around the periphery of your vision. • Demo – Moving markers near periphery

9. Color Deficiency

10. Color Vision • Colorblindness - about 10% of population • Red-green is predominant • Yellow-blue - a few

11. What is color? • Different wavelengths of light are perceived as different colors. • White light contains equal amounts of these colors. (ROY G. BIV)

12. Fill in the Blanks absorb • Black objects _______ all of the pure colors. • White objects _______ all of the pure colors. • Transparent objects _______ all of the pure colors. reflect transmit

13. Color Filters • Red filters transmit red light and absorb the other colors. • Red objects reflect red light and absorb the rest. • In red light, what color do the red petals and green leaves of rose appear?

19. Color Filters • Red filters transmit red light and absorb the other colors. • Red objects reflect red light and absorb the rest. • In red light, what color do the red petals and green leaves of rose appear? • Answers: • Petals appear red • Leaves appear to be black

20. Color Filters • The following color filters are yours to keep in the zip-lock bags: • Red, Green, Blue • Yellow, Magenta, Cyan

21. FlashlightsAll flashlights must work for this exercise.

22. Mixing Colored Light Color Addition • Additive Primary Colors: • Red • Green • Blue • One can produce any color by varying amplitude and mixture or red, green and blue light.

23. Color Addition Examples: • Tiny dots called pixels on Color TV's and Computer Monitors are colored only red, green, or blue. • “Color Addition” • Lab Exercise (two pages) • Color Addition Equations

24. Remember Attendance Sheets(Role Rotation) XO Gathers Supplies EGR Hands-on CO Speaks for the Team + Attendance COM Recorder + Chalkboard

25. Lab Exercises • “White Light” and “Color Addition Wheels” • Everyone will color Roy G. Biv onto the 7 segment wheel. • XO Red + Blue = ? • CO Red + Green = ? • ENG Blue + Green = ? • COM Red + Blue + Green = ?

26. Mixing Colored PigmentsColor Subtraction • Subtractive Primary Colors: • Yellow • Magenta • Cyan • One can produce any color by varying the amount of yellow, magenta and cyan pigments.

27. Color Subtraction Examples: • Newspapers, magazines, books • Zip-lock with colored seals • “Color Subtraction” • Lab Exercise (two pages) • Color Subtraction Equations

28. Color Subtraction Using Crayons Lab Exercise

29. Chromatography Lab Exercise

31. Primary Colors White Red Green Blue Yellow Cyan Magenta

32. Color Addition Primary Green Pure Green Green

33. Complementary Colors - any two colors that add together to produce white • e.g. magenta + green = white

36. Engineering Astronomy Physics

39. And our flag was still there...

40. Spiral