Question

Use graphical method to locate image of an erect object placed before a concave mirror between it's pole and the focus .
Hence write down the nature of image so formed.

Answer 1

When an erect object is placed before a concave mirror between the pole and the focus, then the resultant image is virtual in nature and it is placed behind the concave mirror.

These are explained in the properties of light that explain about the reflective and refractive properties of light.

It is a very important chapter of physics for the secondary students.

Normally, whenever concave mirrors are used. images can either be real or virtual depending upon their position where it is placed.

Answer 2

The nature of an image:

An erect object MN is placed in front of a concave mirror between pole and focus F. A ray of light parallel to the principle axis falls at P at returns through the focus F. Another rat of light passes through the centre of curvature. The image is formed behind the mirror.

Characteristics of the image:

1. The image is virtual that is it cannot be taken on a screen
2. The image is erect
3. It is formed behind the mirror
4. The image is enlarged

The image is attached below.