A dentist uses a mirror to examine a tooth that is 075 cm in

A dentist uses a mirror to examine a tooth that is 0.75 cm in front of the mirror. The image of the tooth is formed 9.0 cm behind the mirror.

Determine the mirror\'s radius of curvature. in cm.

Solution

this is a concave mirror since the image distance is located further from the lens then the object.

p=object distance
q=image distance

(1/p) + (1/q) = 2/R
(1 / 0.75) + (1 / -9) = 2 / R
R=1.636 it is a positive value. Since the image formed is behind the mirror, you have to use the negative sign to indicate that.