(a) A dentist uses a small mirror of radius 40 mm to locate a cavity in a patient's tooth. If the mirror is concave and is held 19 mm from the tooth, what is the magnification of the image?
(b) A production line inspector wants a mirror that produces an upright image with magnification of 7.1 when it is located 10.0 mm from a machine part.
(1) What kind of mirror would do this job?
a concave mirror with the object inside the focal length
a concave mirror with the object outside the focal length
a convex mirror with the object outside the focal length
a convex mirror with the object inside the focal length
(2) What is its radius of curvature?
Image of the concave mirror is investigated.