1. Bellwork What is a photon? What is a photon? * Turn in the EM Vocab Assignment * A wave packet of an EM radiation. A wave packet of an EM radiation.

2. Today’s Agenda Light Polarization Notes Light Polarization Notes Lab Extension Lab Extension Color Notes Color Notes

3. Light Polarization Light Polarization: The alignment of EM waves where their electric fields are parallel Light Polarization: The alignment of EM waves where their electric fields are parallel Note: This is different from electrical polarization (sticking a balloon to the wall)

4. Light Polarization

5. Polarized Light

6. Light Polarization Lightbulb – Nonpolarized Smart Board – Split polarized Monitor – Polarized

8. Lab Extension: The Prism Shine sunlight through the prism 50 cm off the ground on to a white sheet of paper placed on the ground. Shine sunlight through the prism 50 cm off the ground on to a white sheet of paper placed on the ground. Draw the colors and bandwidths of each color Draw the colors and bandwidths of each color Make five observations of your findings. (colors, orientation, relative band widths, etc.) Make five observations of your findings. (colors, orientation, relative band widths, etc.)

9. ColorsColors 4/28/14

10. Are you ready for a pop test?

12. Types of Color Blindness TypeDenomination Prevalence MenWomen MonochromacyAchromatopsia (B/W)0.00003% Dichromacy Protanopia (R/G)1.01%0.02% Deuteranopia (R/G)1.27%0.01% Tritanopia (B/Y)0.0001% AnomalousProtanomaly (R/G)1.08%0.03% TrichromacyDeuteranomaly (R/G)4.63%0.36% Tritanomaly (B/Y)0.0002% Different forms of color vision deficiency

13. Normal, Red/Green (2), Blue/Yellow

14. The Color Spectrum R – Red (longest wavelength / lowest frequency) O – Orange Y – Yellow G – Green B – Blue I – Indigo V – Violet (shortest wavelength / highest frequency)

15. White Light White Light: Is the combination of all of the colors of light (sunlight)

16. The Color Spectrum

17. Pigments Pigment: A material that selectively absorbs colors of light

18. Color by Transmission Some light is absorbed while other light is transmitted

19. Color Addition (Light) Primary colors Red, Blue, and Green Combining colors (adding the primaries together) Red + Green = Yellow Red + Blue = Magenta Blue + Green = Cyan Red + Green + Blue = White

21. Color Addition

22. Color Subtraction (Paints) Primary colors Yellow, Red (Magenta), Blue (Cyan) Combining colors (adding the primaries together) Yellow + Red = Orange Yellow + Blue = Green Blue + Red = Purple

23. Color Subtraction

24. Reflection White – reflects all light Black – absorbs all light

25. Color by Reflection

26. Illuminated with white light The object absorbs all of the colors and reflect only yellow or green

27. Addition and Subtraction

28. Light Scattering Light Scattering: the deflection of a light ray from a straight path (Rayleigh Scattering)

29. Light Scattering Why is the sky blue and sunset red?

31. Blue Sky

32. Sunsets