Question

Boojho and Paheli were given one mirror each by their teacher. Boojho found his image to be erect and of the same size whereas Paheli found her image erect and smaller in size. This means that mirrors of Boojho and Paheli are, respectively.
A. Plane mirror and concave mirror
B. Concave mirror and convex mirror
C. Plane mirror and convex mirror
D. Convex mirror and plane mirror

Answer 1

Hint: To solve this question, we need to recall the type of images that each mirror namely plane mirror, concave mirror and convex mirror forms. Once we know what type of images they form, we can check the type of mirrors that Boojho and Paheli received from their teacher.

Complete step-by-step solution:
There are two types of mirrors: plane mirrors and spherical mirrors. Spherical mirrors are further divided into two types: convex mirrors and plane mirrors.
A plane mirror can be defined as the type of mirror that has a plane surface and forms a virtual and erect image of the object.
While spherical mirrors have a curved surface. In case of a concave mirror the image formed is magnified/of same size/diminished, virtual/real and erect/inverted depending on the position of the object. In case of a convex mirror also known as diverging mirror, the image formed is virtual, erect and smaller in size, although the size of the image keeps on increasing as the object moves towards the mirror.
Hence Boojho has a plane mirror because his image is erect and of the same size and Paheli has a convex mirror because her image is erect and smaller in size. Thus, option $C$ is correct.

Note: The distance of the object from the mirror and the distance of the image from the mirror in case of a plane mirror is the same. In a concave mirror the reflecting surface is found to be bent inwards while in a convex mirror the reflecting surface is found to be bent outwards.