A student is asked to observe his face in three different types of mirrors P, Q, R one by one by holding each mirror close to his face at same distance. Mirror P given exact and same size image, Q gives exact but smaller while R gives exact but larger image.
A. P is Convex mirror, Q is Plane, R is Concave
B. P is Plane, Q is Convex, R is Concave
C. P is Concave, Q is Plane, R is Convex
D. P is Convex, Q is Concave, R is Plane
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → B
The size of the image tells the type of mirror. Each mirror is judged by the image it forms of a face held close to it, that is, an object nearer than the focal length.
Mirror P forms an image exactly the same size as the face, which only a plane mirror does (magnification \( m = 1 \)).
Mirror Q forms a smaller, erect image. A convex mirror always forms a virtual, erect and diminished image, whatever the position of the object.
Mirror R forms a larger, erect image. A concave mirror does this when the object lies between the pole and the focus.
So P is plane, Q is convex and R is concave, which is statement B.