A convex mirror with a focal length of -20 cm forms an image 12 cm behind the surface. If the object height is 1.2 cm what is the image height?
A) 0.30 cm
B) 0.48 cm
C) 0.94 cm
D) 3.0 cm

Question

Quizplus · Accepted Answer

The mirror formula for a convex mirror is 1/f = 1/v + 1/u. Given f = -20 cm and v = -12 cm, we find u using the formula. Then, using the magnification formula m = -v/u = h'/h, where h is the object height and h' is the image height, we calculate h'.

A Convex Mirror with a Focal Length of -20 Cm