A magnifying glass of focal length 5 cm is used to view an object by a person whose smallest distance of distinct vision is 25 cm . If he holds the glass close to eye, the magnification is

Question

A magnifying glass of focal length 5 cm is used to view an object by a person whose smallest distance of distinct vision is 25 cm . If he holds the glass close to eye, the magnification is (A) 5 (B) 6 (C) 2.5 (D) 3

Tardigrade Admin · Accepted Answer

m=1+(D/f) Given, f=5 cm, D=25 cm ∴ m=1+(25/5)=6

Q. A magnifying glass of focal length $5 c m$ is used to view an object by a person whose smallest distance of distinct vision is $25 c m$ . If he holds the glass close to eye, the magnification is

5

6

2.5

3

$m = 1 + \frac{D}{f}$
Given, $f = 5 c m, D = 25 c m$
$∴ m = 1 + \frac{25}{5} = 6$

Q. 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, the magnification is

5

6

2.5

3

m=1+fD​ Given, f=5cm,D=25cm ∴m=1+525​=6

Q. A magnifying glass of focal length $5 c m$ is used to view an object by a person whose smallest distance of distinct vision is $25 c m$ . If he holds the glass close to eye, the magnification is

$m = 1 + \frac{D}{f}$
Given, $f = 5 c m, D = 25 c m$
$∴ m = 1 + \frac{25}{5} = 6$