A magnifying glass of focal length 5cm is used to view an object by a person whose smallest distance of distinct vision is 25cm. If he holds the glass
A magnifying glass of focal length 5cm is used to view an object by a person whose smallest distance of distinct vision is 25cm. If he holds the glass close to eye, then the magnification is
A. 5
B. 6
C. 2.5
D. 3
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Correct Answer - B
Given, f = 5 cm D = 25 cm
`therefore` Magnification, `m=1+(D)/(f)`
`m=1+(25)/(5)=6`
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