State the position, size and nature of image formed in a concave mirror when the object is placed at infinity:

At focus, point-sized and real & inverted

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

At focus, diminished and virtual & erect

No worries! We‘ve got your back. Try BYJU‘S free classes today!

At centre of curvature, enlarged and real & inverted

No worries! We‘ve got your back. Try BYJU‘S free classes today!

At pole, highly enlarged and virtual & erect

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A At focus, point-sized and real & inverted
When the object is placed at infinity, the rays travelling from the object parallel to the principal axis will be incident on the concave mirror and converge at the principal focus of the mirror. The image formed will be real, inverted and highly diminished or point-sized.
So option A is correct.

Suggest Corrections

Similar questions

The image formed by a concave mirror is real, inverted and highly diminished (much smaller than the object). The object must be : (a) between pole and focus (b) at focus (c) at the centre of curvature (d) at infinity

For the object placed between the optical centre and focus of a convex lens, the image is :

(a) real and enlarged

(b) real and diminished

(d) virtual and diminished.

A concave lens forms the image of an object which is :

(a) virtual, inverted, and diminished

(b) virtual, upright, and diminished

(d) virtual, upright, and enlarged.

The image formed by a concave mirror is real, inverted and of the same size as the object. The position of the object must then be : (a) at the focus (b) between the centre of curvature and focus (c) at the centre of curvature (d) beyond the centre of curvature

Q. Question 20
Identify the device used as a spherical mirror or lens in following cases, when the image formed is virtual and erect in each case.

(a) Object is placed between device and its focus, image formed is enlarged and behind it.

(b) Object is placed between the focus and device, image formed is enlarged and on the same side as that of the object.

(c) Object is placed between infinity and device, image formed is diminished and between focus and optical centre on the same side as that of the object.

(d) Object is placed between infinity and device, image formed is diminished and between pole and focus, behind it.

Join BYJU'S Learning Program