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Curved Mirrors

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Curved Mirrors

  1. 1. Curved Mirrors<br />
  2. 2. Reflection Characteristics<br />Attitude<br />Type<br />Inverted<br />Upright<br />Size<br />Real<br />Virtual<br />Laterally Inverted<br />Same<br />Enlarged<br />Reduced<br />
  3. 3. Type<br />Real - image appears in front of the mirror (could be projected onto a screen)<br />Virtual - image appears behind the mirror<br />
  4. 4. Size<br />a) Enlarged - image is larger than the object<br />b) Reduced - image is smaller than the object<br />c) Same - image is the same size as the object<br />a)<br />b)<br />c)<br />
  5. 5. Attitude<br />a) Upright- image is right-side up<br />b) Inverted- image is upside-down<br />c) Laterally Inverted- image is flipped horizontally<br />a)<br />MIRROR<br />b)<br />MIRROR<br />MIRROR<br />c)<br />MIRROR<br />
  6. 6. Curved Mirrors<br />Concave<br />Convex<br />“converging” mirror<br />“diverging” mirror<br />
  7. 7. Concave Mirrors<br />
  8. 8. Concave Mirrors<br />
  9. 9. f<br />Terminology<br />Focal Point (F) - where the light rays meet<br />Vertex - the middle point of a curved mirror<br />Focal Length (f) - the distance from the focal point to the vertex<br />vertex<br />principal axis<br />
  10. 10. Concave Mirror Ray Diagrams<br />Ray 1 - travels parallel to the principal axis and reflects through the focal point (F)<br />
  11. 11. Concave Mirror Ray Diagrams<br />Ray 2 - travels through the focal point and reflects parallel to the principal axis<br />
  12. 12. Concave Mirror Ray Diagrams<br />The point where the two reflected rays converge will be the location of the image<br />
  13. 13. Concave Mirror Reflections<br />4 Cases<br />Object is greater than 2 focal lengths from the mirror (do>2f)<br />Object is between 1 and 2 focal lengths from the mirror (f<do<2f)<br />Object is at the focal point (do=f)<br />Object is between the mirror and the focal point (0<do<f)<br />
  14. 14. Case 1:<br />Reduced<br />Inverted<br />Real<br />
  15. 15. Case 2: <br />Enlarged<br />Inverted<br />Real<br />
  16. 16. Case 3: <br />No Image Formed!<br />
  17. 17. Case 4: <br />Enlarged<br />Upright<br />Virtual<br />
  18. 18. Handout p.429<br />“Drawing Ray Diagrams for Concave and Convex Mirrors”<br />
  19. 19. Convex Mirrors<br />
  20. 20. Curved Mirrors<br />Concave<br />Convex<br />“converging” mirror<br />“diverging” mirror<br />
  21. 21. Convex Mirrors<br />Surface of mirror is curved outward<br />Spreads out light rays (“diverging” mirror)<br />Produces a virtual image that is upright and smaller than the object<br />
  22. 22. Convex Mirrors<br />
  23. 23. Convex Mirrors<br />
  24. 24. Ray Diagrams for Convex Mirrors<br />Ray 1: travels parallel to the principal axis and reflects through the focal point<br />
  25. 25. Ray Diagrams for Convex Mirrors<br />Ray 2: travels towards the focal point and reflects parallel to the principal axis<br />
  26. 26. Ray Diagrams for Convex Mirrors<br />The image appears where the (virtual) reflected rays appear to intersect<br />
  27. 27. Remember:<br />The image for a convex mirror is always virtual, upright and smaller!<br />
  28. 28. Try it!<br />

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