A Positive Lens Has a Focal Length F

question 82

Multiple Choice

A positive lens has a 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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