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  4. The maximum magnification that can be obtained with a convex lens of focal length 2.5 cm is least distance of distinct vision is 25 cm

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Q. The maximum magnification that can be obtained with a convex lens of focal length 2.5 cm is least distance of distinct vision is 25 cm

Jharkhand CECEJharkhand CECE 2011

Solution:

Maximum magnification is obtained when image is formed at near point of eye. In that case
$ m=1+\frac{D}{f} $ $ =1+\frac{25}{2.5}=11 $