Question

A real image with a magnification of 2 times is located 24 cm in the front of concave mirror. The focal length of the mirror is… *

Answer 1

$<font color ="blue">$

Answer:

Magnification = - v/ u.

2 = -24/u

u= 12(I'm front of the mirror)

-1/f = 1/v+ 1/u

-1/f = -1/24 - 1/12

-1/f = -1/8

f= 8 cm