Question

We wish to obtain an erect image of an object, using a concave mirror of focal length $15cm.$ What should be the range of distance of the object from the mirror? What is the nature of the image? Is the image larger or smaller than the object? Draw a ray diagram to show the formation in this case.

Answer 1

Hint : To solve this question we have to know what a concave mirror is. In the event that an empty circle is cut into parts and the external surface of the cut part is painted, at that point it turns into a mirror with its internal surface as the reflecting surface. This kind of mirror is known as a curved mirror.

Complete Step By Step Answer:
We know that object distance should be less than the focal length for the formation of an erect image. So, the range of distance of objects from the mirror should be less than $15cm.$ which is from $0$ to $15cm.$ in the front of the mirror from the pole. The nature of the image so formed will be virtual and erect. The size of the image will be larger than the object.
Here we are going to draw a ray diagram according to the question,

Note :
We can get confused between concave and convex mirrors. So we have to properly know the difference between concave and convex mirrors. We know that, convex Mirror is a bended mirror where the reflective surface lumps out towards the light source. This protruding out surface mirrors light outwards and is not used to focus light.