Mirror Ray TracingMirror ray tracing is similar to lens ray tracing in that rays parallel to the optic axis and through the focal point are used. A third useful ray is that through the center of curvature since it is normal to the mirror and retraces its path backward. |
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Convex Mirror ImageA convex mirror forms a virtual image.The cartesian sign convention is used here. Using a ray parallel to the principal axis and one incident upon the center of the mirror, the position of the image can be constructed by back-projecting the rays which reflect from the mirror. The virtual image that is formed will appear smaller and closer to the mirror than the object.
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Concave Mirror ImageIf the object is outside the focal length, a concave mirror will form a real, inverted image. The cartesian sign convention is used here.
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Concave Mirror ImageIf an object is placed inside the focal length of a concave mirror, and enlarged virtual and erect image will be formed behind the mirror. The cartesian sign convention is used here.
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