CBSE Class 10 Science 2020 · Paper 31/C/1 · Question 23(a)

(a) Shaving: concave mirror. When the face is held between the pole and the focus (within the focal length), the mirror forms an erect and enlarged image of the face, so its details are clearly seen. (b) Large images of the teeth: concave mirror. A tooth held within the focal length gives an erect, enlarged image, so the dentist can see it in detail. (c) Rear view in vehicles: convex mirror. It always forms an erect, diminished image, and because it curves outwards it gives a much wider field of view than a plane mirror, so the driver sees a large area of the traffic behind.