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Problem 11 - Entrance Test

A convex lens is used as a simple microscope when the object is placed:

A. At 2F.B. Between F and 2F.C. Between the optical center and F.D. At infinity.

Correct: C

For a convex lens to act as a simple microscope (magnifying glass), it must produce a virtual, erect, and magnified image. This occurs when the object is placed between the optical center (O) and the principal focus (F) of the lens.