CH 28 NOTES

1. CH 28 NOTES

2. WHAT MAKES RED DIFFERENT THAN BLUE? THEY HAVE DIFFERENT WAVELENGTHS AND DIFFERENT FREQUENCIES

3. ROYGBIV R The only thing we SEE is LIGHT OYGBIV IS ABSORBED You don’t see peppers - you see red light reflected from peppers

4. THE PEPPER HAS RED PIGMENT PIGMENT- material that selectively absorbs color

5. LOW f MED f HIGH f IN THIS CLASS WE’RE GOING TO SIMPLIFY THE SPECTRUM INTO 3 PRIMARY COLORS THE PRIMARY COLORS OF LIGHT ARE: RED GREEN BLUE

6. YELLOW GREEN RED WHITE MAGENTA CYAN BLUE

7. Secondary Colors of Light YELLOW MAGENTA CYAN

8. R G B R G B IS ABSORBED

9. R G B G R B IS ABSORBED

10. R G B R B G IS ABSORBED

11. R G B R G B IS ABSORBED

12. R G B R G B No light IS ABSORBED That is why it is coolest to wear white

13. R G B No light All light IS ABSORBED That is why it is hotest to wear black

14. * White is the combination of all light * Black is the absence of light

15. Necklace Demo

16. Complementary Colors - Two colors that combine to make white light RED & CYAN BLUE & YELLOW GREEN & MAGENTA

17. Color Math! Red + Blue = White - Green = White - Cyan = Yellow + Blue = Magenta Magenta Red White

18. B The source of light is not always white B IS ABSORBED There is no light reflected, the pepper appears BLACK

19. R R The banana would appear red

20. THE END