A Lens Has a Positive Focal Length F

question 64

Multiple Choice

A lens has a positive focal length f. The only way to get a magnification of -1 is to

• A) place a real object at the focal point.
• B) place a real object at a distance 2f from the lens.
• C) place a virtual object at a distance 2f from the lens.
• D) Magnifications can never be negative.
• E) None of these is correct.

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