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Properties of Light Mirrors and Lenses

Properties of Light Mirrors and Lenses. Unit 12. Electromagnetic Waves. Travel through a vacuum. No medium Radiation Travel at the speed of light. 3 X 10 8 m/s. Visible Light.

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Properties of Light Mirrors and Lenses

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  1. Properties of LightMirrors and Lenses Unit 12

  2. Electromagnetic Waves • Travel through a vacuum. • No medium • Radiation • Travel at the speed of light. • 3 X 108 m/s

  3. Visible Light

  4. RedOrange Yellow Green BlueIndigo Violet ROYGBIV

  5. Law of Reflection

  6. θi θr Law of Reflection Incident Ray Reflected Ray Normal

  7. Law of Reflection θi – angle of Incidence θr – angle of Reflection θi =θr

  8. Plane Mirror di do Object Image Virtual Upright do = di

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

  10. Regular vs. Diffuse Reflection

  11. Concave – Convex Mirrors

  12. Concave Mirrors

  13. Convex Mirror

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

  15. C F Concave Mirrors

  16. C Real Inverted F Concave Mirrors

  17. C F Concave Mirrors f do di

  18. C F Concave Mirrors

  19. C F Concave Mirrors No Image

  20. C F Concave Mirrors Upright Virtual

  21. Convex Mirrors F C Upright Virtual

  22. Scale: 1 box = 2.5cm C F

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

  24. Refraction

  25. Light and Color

  26. Transparent Material that passes or transmits light.

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

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

  29. Retina

  30. How we see colors?

  31. Red Green Blue Primary Colors (light)

  32. Blue White Green Red

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

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

  35. 25

  36. 29

  37. 45

  38. 56

  39. 6

  40. 8

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

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

  43. Nearsighted

  44. Farsighted

  45. Focal Point Focal Point For a convex lens the point where parallel rays converge. Converging Lens

  46. Focal Point Focal Point For a concave lens the point where parallel rays diverge. Diverging Lens

  47. Image: Real Inverted F Convex Lens Ray Diagram 2F F 2F 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.

  48. Concaved LensRay Diagram F F Image: Virtual Upright 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.

  49. Telescope

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