1. Please be Seated

2. It’s Physics Physics is Phun November 2007

3. How does a magnifying glass work?

5. Why does the pitch of a train whistle change as it passes you?

6. Fraunhofer Spectrum

7. Why do you produce an electric spark when you shuffle across a rug and touch metal?

8. Quantum Mechanical Tunneling

9. Triboelectricity The tribeoelectric series: + POSITIVE END OF SERIES glass nylon wool silk paper cotton synthetic rubber saran polyethylene Teflon silicone rubber - NEGATIVE END OF SERIES

10. Van de Graaff generator

12. Charging by Induction

13. What causes lightning?

14. Electric charge in cloud

15. Possible lightning paths

16. Charge and image

17. The “Leader”

18. Main Stroke

19. Lightning striking tree

20. Lightning striking Empire State Building

21. Shoes of man struck by lightning Man not hurt!!

22. How does a lightning rod work?

23. How does a microwave oven work?

24. Polar Molecule Effect of electric field on polar molecule http://www.colorado.edu/physics/2000/applets/h2ob.html

25. Marie Sophie Germain (1776-1831) Solved mathematical equations for the Chladni Plate experiment. Received the Napoleon Prize (1 kg gold) for Mathematics in 1816 Sophie’s World web site http://www.geocities.com/Paris/Villa/1776/

26. Microwave oven

27. Standing waves in oven

28. Superheated Water Superheated Water http://www.phys.unsw.edu.au/%7Ejw/superheating.html

29. How do Polaroid sunglasses work?

30. Polaroid sunglasses remove horizontally polarized glare

31. What makes a rainbow?

35. Why do stars “twinkle?”

36. Why is the sky blue? Why is the sunset red?

37. Is the sky blue, or does it just look like it?

38. Rayleigh scattering: Light scatters off dust, O 2 and N 2

39. Sunrise from airplane #3

40. Sunrise from airplane #2

41. Sunrise from airplane #1

42. We are on the web at http://www.physics.umd.edu/lecdem/ Animated Gifs compliments of bellsnwhistles.com The End See you in January!