Question

The mirror used in a dressing table is a

• A. concave mirror
• B. convex mirror
• C. plane mirror
• D. none of these

Answer 1

The correct option is C

plane mirror

Explanation for the correct option:

C: Plane mirror

1. They are used as looking glasses such as dressing table mirrors, washbasin mirrors, and mirrors in saloons.
2. They are used for making instruments like periscopes and kaleidoscopes.

Explanation for the incorrect option(s):

A: Concave mirror

1. Concave mirrors are used as shaving mirrors by men to see an enlarged image of a face.
2. Concave mirrors are used as reflectors in torches, and headlights of vehicles (such as cars, scooters, buses, trucks, and train engines) to get a strong straight beam of light
3. Concave mirrors are used by dentists to see an enlarged image of teeth.

B: Convex mirror

1. Convex mirrors are used as rear-view mirrors or side-view mirrors in automobiles such as cars, scooters, trucks, and buses to see the traffic coming from behind.
2. Convex mirrors form erect and highly diminished images of the objects due to which we see a large number of objects spread over a large area on the road behind us.
3. Big convex mirrors are used as vigilance mirrors in big shops and stores. The shopkeeper can keep an eye on the customers to look for thieves and shoplifters.

Hence, option C is correct.