Question

What is the position of the image if the position of the object is between $P$ and $F$ and size of image is enlarged if image is formed through a concave mirror?
A. At infinity
B. At $C$
C. Behind mirror
D. Beyond $C$

Answer 1

Hint: Reflecting surface of concave mirror is the internal curved surface as surface is curved reflected rays are converged and hence concave mirror is also known as converging mirrors. The position of the image formed by the concave mirror depends on the object’s distance from the center of the mirror known as Pole.

Complete answer:
Concave mirror forms both real and virtual images of objects depending on the distance between them. There are a total of six cases when images are formed by a concave mirror.Object’s position far from $C$, images are small then object size and after $C$ image size gets magnified and at $C$ size of both remains same.

Object position	Image position	Nature of image formed
At infinity	At Focus	Real, diminished, inverted
Beyond C	Between C and Focus	Real, diminished, inverted
At C	At C	Real, same size, inverted
Between C and Focus	Beyond C	Real, magnified, inverted
At Focus	At infinity	Real, magnified, inverted
Between focus and P	Behind mirror	Virtual, magnified

Thus, option C is the correct answer.

Note:Concave mirrors have a variety of usage in day to day, as reflector, headlights, solar furnaces. When the position of the object is between focus and pole the mirror is used as a shaving mirror, dentist’s mirror as the image appears erect and enlarged.