1. Refraction Demos O43 – O68 Created for CVCA Physics By Dick Heckathorn 1 June 2005

2. Eyeglass Lens Examine blank lens ‘A’ Partially ground lens ‘B’ Further ground lens ‘C’ Read the information that came with the lens. O-43

3. O-43 Eyeglass Lens

4. Etched Lens Examine the lens. What do you think made the small cracks in the lens? Ask your instructor For an explanation. O-43A

5. O-43A Etched Lens

6. Eye Glass Lens Look through various lenses at both near and far objects. Rotate the lens. Examine the shape of the lens. What do you observe? O-44

7. O-44 Eye Glass Lens

8. Eye Examination Lenses Look through various lenses at both near and far objects. Rotate, then examine the shape of the lens. What do you observe? O-44A

9. O-44A Eye Examination Lens

10. Car Headlight Lens Feel my surface. Handle the lens carefully. Shine a parallel beam of light from a flashlight through the lens. What do you observe? O-44B

11. O-44B Car Headlight Lens

12. Fish Eye Lens How many images can you see when you look through the lens? Would you like to have an eye like this? O-45

13. O-45 Fish Eye Lens

14. Special Lenses Look through first the red and then the blue covered lens. Rotate each cylinder as you look through it. Examine the shape of the material. O-45A

15. O-45A Fish Eye Lens

16. Laser Lens Remove the tiny lens from the envelope. Look through the lens at some white light. Position the lens so that reflected light is seen? Why the difference? O-45B

17. O-45B Laser Lens

18. Marble In Shot Glass Look into the empty glass. What do you see? Look into the glass after pouring water into the glass. Now, look into the glass. What do you see? 0-45C

19. O-45C Marble in Shot Glass

20. Money Shrink Put a penny into the bank. What happens to the penny? Explain what happened to the penny. What physics properties are involved? O-45D

21. O-45C Money Shrink

22. Fresnel Lens Look through the lens. What do you see? Have someone hold the lens up to their face. What do you see? how was the fresnel lens made? O-46

23. O-46 Fresnel Lens

24. Multi-Fresnel Lens LOOK AT OBJECTS THROUGH THE MANY LENSES. HOW MANY OBJECTS DO YOU SEE? ARE THEY ALL THE SAME SIZE? WHAT TYPE OF LENS IS IT? O-46A

25. O-46A Multiple Frsnel Lens

26. Fresnel Mirror LOOK INTO THE MIRROR AS YOU MOVE IT TOWARDS AND AWAY FROM YOUR FACE. WHAT TYPE OF LENS IS IT? EXPLAIN WHAT IS GOING ON. O-46B

27. O-46B Fresnel Mirror

28. Eye Scope HOLD IT VERY CLOSE TO YOUR EYE WITH THE LIGHT TURNED ON. LOOK INTO THE LIGHT. WHAT DO YOU SEE? PLEASE TURN OFF LIGHT WHEN FINISHED. O-47

29. O-47 Eye Scope

30. Film Can With Holes USE THE GOLF TEE TO HOLD THE FILM CAN. LOOK THROUGH THE END FIRST WITH 1 HOLE AND THEN THE END WITH 3 HOLES. WHAT IS THE ORIENTATION OF THE THREE OPENINGS IN EACH CASE? O-48

31. O-48 Film Can with Holes

32. Film Can With Pin LOOK AT THE PIN THROUGH THE SINGLE OPENING. LOOK AT THE PIN THROUGH THE OTHER END WITH THE PIN CLOSE TO YOUR EYE AND SEEN IN THE SMALL OPENING. WHAT IS THE ORIENTATION OF THE PINS IN EACH CASE? O-48A

33. O-48A Film Can with Pin

34. Pocket Watch Hologram LOOK AT THE WATCH FROM VARIOUS LOCATIONS. WHAT DO YOU SEE? WHAT TIME IS IT? HOW IS A HOLGRAM MADE? 0-57

35. O-57 Pocket Watch Hologram

36. Cable Car Hologram LOOK AT THE CABLE CAR FROM VARIOUS LOCATIONS. WHAT DO YOU SEE? HOW ARE HOLOGRAMS MADE? O-57A

37. O-57A Cable Car Hologram

38. Tiger Hologram LOOK AT THE TIGER FROM VARIOUS LOCATIONS. WHAT DO YOU SEE? HOW ARE HOLOGRAMS MADE? O-57B

39. O-57B Tiger Hologram

40. Rainbow Glasses LOOK THROUGH THE GLASSES AT BOTH FLUORESCENT AND INCANDESCENT LIGHT. SHINE A LASER BEAM THROUGH ONE OF THE LENS TOWARDS THE CHALKBOARD. WHAT DO YOU SEE? O-62

41. O-62 Rainbow Glasses

42. Rainbow Disk SPIN ME UNDER BOTH FLUORESCENT AND INCANDESCENT LIGHT. HOW DO I MAKE THE PRETTY PATTERNS? 0-62A

43. O-62A Rainbow Disk

44. Iridescent Cards LOOK AT THE CARDS FROM VARIOUS LOCATIONS. WHAT DO YOU SEE? HOW ARE THE CARDS MADE? READ THE INFORMATION ON THE BACK. O-62B

45. O-62B Iridescent Cards

46. Dimension Disk SPIN ME UNDER FLUORESCENT AND INCANDESCNET LIGHT. WHAT DO YOU SEE? HOW DO I WORK? O-68

47. O-68 Dimension Disk

48. That’s all folks!