1. Electromagnetic Waves Mr. Boyle Chatfield Senior High

2. Speed of Light The speed of light (variable c) is 3 X 10 8 m/s. This is true for the whole electromagnetic spectrum.

3. ROY G BIV

4. Using a Classroom Projector to Study the Properties of Light Drs. Michael Ottinger and Brian Bucklein Missouri Western State University St Joseph, MO 64507 Missouri Association of Physics Teachers Meeting November 6, 2010

5. Three Color Image System Red Image Blue Image Green Image Superimpose Images Red Lamp Blue Lamp Green Lamp

6. Breaking down the Colors The following slides were made by using the “Shapes” drop down in PowerPoint to make two thin rectangular lines. The top line was set to white and, using the color setting the bottom line was set to different color combinations.

8. White

9. Red

10. Green

11. Blue

12. Yellow = Red + Green

13. Magenta = Red + Blue

14. Cyan = Green + Blue

15. White = Red + Blue + Green

18. What I look like RGB lamp

19. What color looks like under Sodium Lamp …

20. A question Winnie the Pooh (the yellow skinned bear) is placed under red light. How will he appear?

21. The answer

22. Other colors…

25. Other colors….

26. Other colors…

27. Me under infrared light

28. Intensity of Light Transparent – Light Completely passes through (Glass, transparency Translucent Light partially passes through (frosted glass) Opaque Light completely blocked.

29. Reflection of Light Mirrors…

30. Inverse Square Law of Light

31. Microwaves (High wavelength) Used for communication and to cook food. Microwaves work by resonating water molecules. Do not put foil in the microwave!

32. Light is a Particle? Radiometer

33. A demonstration

34. Light is a wave Polarization

37. Diffraction A wave property of light…

38. Light A discrete quantity of energy…. It is both a wave and a particle…

39. Laser Light Amplification by Stimulated Emission of Radiation…

40. Hologram An object beam interferes with an image beam…