The near vision of an average person is $25 c m$ .
To view an object with magnification $10$ ,
$m = \frac{D}{f} \Rightarrow f = \frac{D}{m}$
$= \frac{25}{10} = 2.5 = 0.025 m$
$P = \frac{1}{0.025} = 40 D$

Question

The near vision of an average person is 25 cm. To view an object with an angular magnification of 10 , what should be the power (in diopters) of the microscope? (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

The near vision of an average person is 25 cm. To view an object with magnification 10 , m=(D/f) ⇒ f=(D/m) =(25/10)=2.5=0.025 m P=(1/0.025)=40 D

Q. The near vision of an average person is 25cm. To view an object with an angular magnification of 10 , what should be the power (in diopters) of the microscope?

The near vision of an average person is 25cm. To view an object with magnification 10 , m=fD​⇒f=mD​ =1025​=2.5=0.025m P=0.0251​=40D

Q. The near vision of an average person is $25 c m$ . To view an object with an angular magnification of $10$ , what should be the power (in diopters) of the microscope?

The near vision of an average person is $25 c m$ .
To view an object with magnification $10$ ,
$m = \frac{D}{f} \Rightarrow f = \frac{D}{m}$
$= \frac{25}{10} = 2.5 = 0.025 m$
$P = \frac{1}{0.025} = 40 D$