Answer to Question #214886 in Optics for lala

Question

The magnification of a simple magnifier is increased when using the magnifier with

A. a shorter focal length.

B. a lower optical power.

C. a higher index of refraction.

D. the larger radius of curvature on both lens surfaces.

Answer 1

We know that

$M=1+\frac{D}{F}$

$F( \downarrow),M(\uparrow)$

When D=25 cm

F=short then M is increase

Option (A) is correct option

a shorter focal length.