Question

the magnificatoin of image by the concave mirror is 1 ​

Answer 1

1. Image is real .

2.Image is inverted.

3.Image is of same size of the object .

4.Object is kept on curvature

Answer 2

Given, Magnification of image by concave mirror = - 1, Characteristics of the image formed will be as follows :

For concave mirror, We know that, Focal length is negative.

Magnification ( m) = $\frac{ h_{i} }{ h_{u} }$

That implies, - 1 ( Height of the object) = Height of the image.

Height of image = - 1 * Height of the object.

We can conclude, image is formed below the principal axis ( inverted) and same size.

Now, We also know that,

$m = \frac{ - v}{u}$

-1 = - v/u

-v = - u.

Image distance = Object distance.

We can say that, Image is formed at Centre of curvature, and is a real image.

Finally, The characteristic of the image if m = - 1 :

1) Image is formed below the principal axis, that is inverted.

2) Image is of the same size.

3) Image if formed at C.

4) A real image is formed.

5) Image can be seen on a screen.