How Mirrors Form Images

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27
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41

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Here the object is between the center of curvature and the focal point. The image is now magnified, inverted, and real.

Go back and look at the green ray for all of this series of mirror images. The reflected ray does not change from one object position to the next. The image will form at some point on this ray.

The primary focal point is where the light source is and the rays reflect parallel to the axis. The rays that are parallel to the axis reflect through the secondary focal point. With mirrors, the two focal points are in the same place, so we have one focal point, and it is both the primary and secondary focal points.
 
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