Question

Please do it correctly I've check  26.086 cm focal length and 0.313 magnification that is wrong.

Question: When an object is placed 24.0 cm in front of a convex spherical mirror, a virtual image forms 12.5cm behind the mirror. Determine the mirror's focal length in cm and the

magnification

a) the mirror's focal length in cm

b) the magnification

Answer 1

a)

For virtual image

i=-12.5 cm

From thin lens equation

1/f = 1/p +1/i

1/f = 1/24 +1/(-12.5)

f=-26.087 cm

b)

Magnification

M=-i/p =-(-12.5)/24

M=0.520833