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Solve the problem similar to the previou...

Solve the problem similar to the previous on if A and A' are interchanged.

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a. The paths of the rays are shown in the following figure. First, draw the ray `A A^(')` until it intersects with the principal optial axis and then find the center of the lens C. Since the virtual image is magnified, the lens is convex.
Draw the ray AB parallel to the principal optical axis. It is refracted by the lens so that it passes through its focus and its continuation passes through the virtual image.
The ray `A^(')B` intersects the principal optical axis at point F, the focus of the lens.

b. The paths of the rays are shown in the following figure.
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