An object and its image are both 12.4 cm from a spherical mirror, and on the same side of the mirror. (a) Is the mirror concave or convex? (b) What is the mirror"s focal length? State your answer with the correct sign. HW13 Key 6.You look into a shaving mirror and the upright image of your face is 40.0 cm away from you. The image has a magnification of 1.50. (a) How far away are you from the mirror? (b) What is the radius of curvature?