A physics teacher asks students to create a scenario where a concave mirror is used for shaving to get a large, upright image of the face. Where must the face be positioned relative to the mirror for this result?
Between the pole and the focus of the mirror
A concave mirror produces different types of images depending on the position of the object relative to its pole, focus and centre of curvature.
When an object is placed between the pole and the focus of a concave mirror, the mirror forms a virtual, erect and magnified image behind the mirror.
This is exactly the enlarged, upright image needed for close-up tasks like shaving or applying makeup, which is why concave mirrors are used for this purpose.
Hence, the face must be positioned between the pole and the focus of the concave mirror to get a large, upright image.
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