1.

A magnifying glass is to be used at the fixed object distance of 1 inch. If it is to produce an erect image magnified 5 times its focal length should be                                            [MP PMT 1990]

A.            0.2 inch                                   
B.            0.8 inch  
C.            1.25 inch                                
D.            5 inch
Answer» D.            5 inch


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