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11.9 Images in Curved Mirrors

11.9 Images in Curved Mirrors. Concave vs. Convex Mirrors. Concave and Convex mirrors are curved mirrors that have a SPHERICAL shape. Con cave mirrors are silvered on the inside of the curve. Con vex mirrors are silvered on the outside of the curve. Terminology of Concave Mirrors. C. V.

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11.9 Images in Curved Mirrors

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  1. 11.9 Images in Curved Mirrors

  2. Concave vs. Convex Mirrors Concave and Convex mirrors are curved mirrors that have a SPHERICAL shape. Concave mirrors are silvered on the inside of the curve. Convex mirrors are silvered on the outside of the curve.

  3. Terminology of Concave Mirrors C V • The Centre of Curvature (C): • The centre of the sphere that would be formed by the curve of the mirror • The Principal Axis: • The line through C and the centre of the mirror. • The Vertex (V): • The point at which the principal axis meets the mirror

  4. The Focus • The Focus (F): • Rays which are parallel to the principal axis are reflected back and converge (meet) at the Focus of the mirror. • The focus is located exactly half way between the center of curvature and the mirror. • NOTE: For this reason, a concave mirror is often called a CONVERGING mirror.

  5. Rules for Locating an Image in a Converging Mirror F C V • A light ray PARALLEL to the principal axis is reflected through the FOCUS.

  6. Rules for Locating an Image in a Converging Mirror F C V • A Light ray through the centre of curvature is reflected back unto itself.

  7. Rules for Locating an Image in a Converging Mirror F C V • A ray through F will reflect parallel to the principal axis.

  8. Rules for Locating an Image in a Converging Mirror F C V • A ray aimed at the vertex will follow the law of reflection (this can be measured along the principal axis).

  9. Putting it all together SALT: Size = Smaller Attitude= Inverted Location = Between C and F Type = Real F C V NOTE: You do not need to draw all 4 rays. Two rays are required to locate the image, a third ray will confirm the location.

  10. COMPLETE WORKSHEET: CONVERGING MIRRORS

  11. Object Between C and F SALT: Size = Attitude = Location = Type =

  12. Object between F and Mirror SALT: Size = Attitude = Location = Type =

  13. Object at C SALT: Size = Attitude = Location = Type =

  14. Object at F SALT: Size = Attitude = Location = Type =

  15. Summary • A light ray PARALLEL to the principal axis is reflected through the FOCUS. • A Light ray through the centre of curvature is reflected back unto itself. • A ray through F will reflect parallel to the principal axis. • A ray aimed at the vertex will follow the law of reflection (this can be measured along the principal axis).

  16. Images In Convex Mirrors Optics Unit

  17. Images in Convex Mirrors V F C A light ray parallel to the principle axis is reflected as if it came from the focus

  18. Images in Convex Mirrors V F C A light ray aimed at the focus (F) is reflected parallel to the principle axis

  19. Images in Convex Mirrors V F C A light ray aimed at the center of curvature (C) is reflected back upon itself.

  20. Images in Convex Mirrors V C F

  21. Convex Mirrors • Convex mirrors are diverging mirrors, silvered at the outer glass curve. S = Smaller A = Upright L = Behind mirror T = Virtual

  22. Images in a Diverging Mirror • Reflected rays never cross in front of a diverging mirror to create an image. • The images created by a diverging mirror are always virtual. • Convex mirrors show a wide range of view with their smaller virtual image. • Convex mirrors are commonly used as side view mirrors in cars • “Objects in mirror are closer than they appear” is written on these mirrors. • This reminds the viewer that they are seeing a smaller image.

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