In which of the following, the image of an object placed at infinity will be highly diminished and point sized?

Concave mirror

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Convex mirror

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Plane Mirror

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None of the above

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Solution

The correct option is A
Concave mirror

The image of an object placed at infinity will be highly diminished and point sized in a concave mirror. The image formed in a convex mirror, when the object is at infinity, will not be at the focus and will have a finite size. The image formed in the plane mirror will be as far as the object is from the mirror, and will have the same size as the object.

Hence, only in a concave mirror, the image formed by an object at infinity be at the focus and point sized.

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Similar questions

Q. A real image, equal in size to the object, is obtained when the object is placed at the centre of curvature in front of
(a) a plane mirror.
(b) a convex mirror.
(c) a concave mirror.
(d) either a convex or a concave mirror.

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

Q. Question 19
In which of the following, the image of an object placed at infinity will be highly diminished and point sized?

(a) Concave mirror only
(b) Convex mirror only
(c) Convex lens only
(d) Concave mirror, convex mirror, concave lens and convex lens

In which of the following, the image of an object placed at infinity will be highly diminished and point sized?

Q. The image of an object placed at infinity will be highly diminished and point sized in

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