1. Properties of Light Mirrors and Lenses Unit 12

2. Electromagnetic Waves  Travel through a vacuum. No medium Radiation  Travel at the speed of light. 3 X 10 8 m/s

4. Visible Light

5. R ed O range Y ellow G reen B lue I ndigo V iolet ROYGBIV

6. Law of Reflection

7. Normal Incident Ray Reflected Ray θiθi θrθr

8. Law of Reflection θ i – angle of Incidence θ r – angle of Reflection θ i = θ r

9. Plane Mirror ObjectImage dodo didi Virtual Upright d o = d i

10. Virtual Image  Images which are formed in locations where light does not actually reach.  Appears to be inside the mirror or lens.

11. Regular vs. Diffuse Reflection

12. Concave – Convex Mirrors

13. Concave Mirrors

14. Convex Mirror

15. Concave Mirrors 2 CF F – Focal Point of the mirror. C – Center of Curvature.

16. Concave Mirrors CF

17. CF Real Inverted

18. Concave Mirrors CF f dodo didi

19. Lens/mirror Equation 1f1f 1do1do 1di1di =+

20. Magnification m hihohiho =m -d i d o = hoho hihi

21. Concave Mirrors CF

22. CF No Image

23. Concave Mirrors C F Upright Virtual

24. Spherical vs. Parabolic Mirrors Spherical Aberration

25. Convex Mirrors CF Upright Virtual

26. Concave Mirrors Problem CF f didi dodo d o = 15cm f = 10cm h o = 5cm Given: d i = ? h i = ? Find: hihi hoho

27. Equation:1f1f 1d01d0 1di1di =+ 1 10 1 15 1di1di -= 1f1f 1d01d0 1di1di -= 1di1di.10.067 =-

28. 1di1di.10.067 =- 1di1di.033 = didi = 1.033 didi = 30cm

29. -d i d o m= hihohiho = -d i x h o d o hihi = -30 x 5 15 hihi = -10cm hihi = Inverted

30. CF Scale: 1 box = 2.5cm

31. Homework 18-1 Practice problems: 1-5, 6-8 Pages: 425,427 Review: 18-1 Page: 428 Due: 5/2/03

32. Refraction

33. Light and Color

34. Transparent Material that passes or transmits light.

35. Opaque Material that adsorbs light. No light will pass through.

36. Translucent Materials that light will shine through, but you cannot see clearly through it.

37. Retina

38. How we see colors?

39. The retina, in the back of the eye, has a large number of nerve endings. When light strikes these nerves a chemical reaction takes place which stimulates the nerves that send a message to the brain.

40. Primary Colors (light) RedGreenBlue

41. White Blue Red Green

42. Color Blindness The color receptors in the eyes (cones) do not function correctly.

43.  Inherited Condition  8% of Men  ½% of women Ability to distinguish between colors. Primarily red and green. Green cones are deficient.

44. 25

45. 29

46. 45

47. 56

48. 6

49. 8

50. Types of Lenses Convex Lens – A lens that is thicker in the center than at the edges.

51. Types of Lenses Concave Lens – A lens that is thinner in the center than at the edges.

52. Nearsighted

53. Farsighted

54. Focal Point For a convex lens the point where parallel rays converge. Focal Point

55. For a concave lens the point where parallel rays diverge. Focal Point

56. Convex Lens Ray Diagram F 2F F Image: Real Inverted 1.Parallel Rays go through the focal point. 2.Rays going through the middle go straight. 3.Rays going through the focal point come out parallel.

57. FF Image: Virtual Upright Concaved Lens Ray Diagram 1.Parallel Rays come from the focal point. 2.Rays going through the middle go straight. 3.Rays going through the focal point come out parallel.

58. Convex Lens F2F F Image: Real Inverted

59. Convex Lens F2F F Image: Real Inverted

60. Convex Lens F2F F No Image

61. Convex Lens F2F F Image: Virtual Erect

62. Convex Lens Problem F2F F d o = 35cm f = 15cm h o = 15cm Given: d i = ? h i = ? Find: dodo f hoho

63. Equation:1f1f 1d01d0 1di1di =+ 1 15 1 35 1di1di -= 1f1f 1d01d0 1di1di -= 1di1di.067.029 =-

64. 1di1di.038 = didi = 1.038 didi = 26 cm 1di1di.067.029 =-

65. -d i d o m= hihohiho = -d i x h o d o hihi = -26 x 15 35 hihi = -11cm hihi = Inverted

66. F Scale: 1 box = 5cm 2FF

67. Homework 18-2 Practice Problems: 12-13 Page: 435 Problems: 35,38,39 Page: 441 Due: 5/5/03 Test: 5/9/03

68. Convex Lens Problem F2F F d o = 50cm f = 20cm h o = 10cm Given: d i = ? h i = ? Find:

69. Homework 18-3 Problems: 32,40 Page: 440-441 Due: 5/7/03 Test: 5/9/03

70. Telescope

73. Microscope

74. Homework 18-4 Study Guide Due: 5/8/03 Test: 5/9/03