Question

If image of an object formed by a concave mirror is inverted and smaller than the object then,
1. u<2f
2.u>2f
3. u is greater or equal to 2f
4.u=2f

Answer 1

the correct answer is u>2f

Answer 2

Answer:

The correct answer to the question-" If image of an object formed by a concave mirror is inverted and smaller than the object then," is-

2 .u > 2f is the answer.

Explanation:

Concave mirrors

Concave mirrors form both real and virtual images. When the concave mirror is placed very close to the object

• a virtual and
• magnified image

is obtained and if we increase the distance between the object and the mirror, the size of the image reduces and real images are formed.

'u' refers to image distance and 'f' refers to focal length.

Therefore, '2f' will be radius of curvature.

Then, for a concave mirror, when an object is kept beyond the centre of curvature (i.e. u >2f) , the image produced is real, inverted and smaller than the object.

Also, the real image is produced in between the focus and the centre of curvature (i.e. f < v < 2f).

The object then, u > 2f

Now, for a concave mirror, when an object is kept beyond the centre of curvature (i.e. u >2f) ,

the image produced is-

• real,
• inverted and
• smaller than the object.

Therefore, in a concave mirror when an object is kept at u> 2f then the image of an object is formed inverted and smaller than the object.