1.

A simple magnifying lens is used in such a way that an image is formed at 25 cm away from the eye. In order to have 10 times magnification, the focal length of the lens should be                                           [MP PET 1990]

A.            5 cm                                         
B.            2 cm
C.            25 mm                                    
D.            0.1 mm
Answer» D.            0.1 mm


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