An object is placed in front of a convex mirror with a radius of curvature of magnitude 10 cm. the mirror produces an image that is 4 cm behind the mirror. how far from the mirror was the object placed?
what is the magnification?

u = - 20 cm

m =

Given:

Radius of curvature, R = 10 cm

image distance, v = 4 cm

Solution:

Focal length of the convex mirror, f:

f =

Using Lens' maker formula:

Substitute the given values in the above formula:

u = - 20 cm

where

u = object distance

Now, magnification is the ratio of image distance to the object distance:

magnification, m =

magnification, m =

m =

m =

positive reinforcement? ?