Curved Mirrors

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