Question

The mirror used as shaving mirror is :

• A. Convex
• B. Concave
• C. Plane
• D. any of these

Hint:

For a shaving mirror, you want a {magnified} and {erect} image of your face.
{Concave mirror:} Produces a magnified, erect, virtual image when the object is held close (between pole and focus). This is ideal for shaving.
{Convex mirror:} Always produces a diminished (smaller) image. Not suitable.
{Plane mirror:} Produces an image of the same size. Not magnified.

Answer 1

The Correct Option is B

Concept: A shaving mirror is used to get a magnified and erect image of the face so that small details can be seen clearly. Different types of mirrors produce different types of images. Step 1: Analyze image formation by different mirrors
Convex Mirror: Always forms a virtual, erect, and {diminished} (smaller) image, regardless of the object's position. This is not suitable for a shaving mirror as a magnified image is needed. Convex mirrors are used as rear-view mirrors in vehicles because they provide a wider field of view.
Concave Mirror:
When the object (face) is placed between the pole and the focus of a concave mirror, it forms a virtual, erect, and magnified image behind the mirror. This is the property utilized in shaving mirrors and makeup mirrors.
If the object is placed further away (e.g., beyond the focus), a concave mirror forms real and inverted images (which can be magnified, same size, or diminished depending on the exact position).
Plane Mirror: Forms a virtual, erect image that is the {same size} as the object and located as far behind the mirror as the object is in front. It does not provide magnification, which is desired for shaving.
(4) any of these: Incorrect, as only one type is specifically suited for the purpose of a magnified, erect image for shaving. Step 2: Identify the suitable mirror for shaving To get a magnified and erect image, a concave mirror is used, with the face placed close to the mirror (between its pole and focus).