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Physics Chemistry

Entry Test MCQ :: Optical Instruments

  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

Answer: Option D
liza said:    
 
i want to know how it is 4f?
aqib chughtai said:    
 
i want to know how it is 4f?
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