A student is given two different convex spherical mirrors and asked to determine which of the mirrors has the shorter focal length. Answering which of the following questions would allow the student to make this determination? Select two answers.
(A) Which mirror has a larger magnification for a given object distance?
(B) Which mirror has the greater change in magnification when submerged in water?
(C) Which mirror produces an upright image? (D) Which mirror has a smaller radius of curvature?