Physics
NULL
Medium
Question
The minimum distance between an object and its real image in a convex lens is_____________?
A
2 f
B
2.5 f
C
3f
D
4f
✓ Official correct answer
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A
2 f
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B
2.5 f
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C
3f
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D
4f
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Explanation
A convex lens forms a real image only when the object is beyond f; the object-to-image separation is minimized (at 4f) when the object sits at 2f, producing an equal-size real image also at 2f.
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