When an object lies at the focus of a concave mirror, then the position of the image formed and its magnification are

pole and unity

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infinity and focus

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inifity and inifity

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centre of curvature and unity

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Solution

The correct option is A pole and unity
Object between Principal Focus (F) and Pole (P): When the object is placed between principal focus and pole of a concave mirror, an enlarged, virtual and erect image is formed behind the mirror.
when an object is placed at the principal focus of a concave mirror, it produces real, inverted, highly enlarged image at infinity. But practically, no image is formed, as the light rays passing through the principal focus travel parallel to each other and never meet

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Similar questions

Q. If a concave mirror forms a real magnified image of an object, the object is located

(a) between pole and focus
(b) between focus and centre of curvature
(c) beyond centre of curvature
(d) at centre of curvature

The image formed by a concave mirror is virtual, erect and magnified. The position of object is : (a) at focus (b) between focus and centre of curvature (c) at pole (d) between pole and focus

Q. (a) An object is placed just outside the principal focus of concave mirror. Draw a ray diagram to show how the image is formed, and describe its size, position and nature.
(b) If the object is moved further away from the mirror, what changes are there in the position and size of the image?
(c) An object is 24 cm away from a concave mirror and its image is 16 cm from the mirror. Find the focal length and radius of curvature of the mirror, and the magnification of the image.

The image formed by a concave mirror is observed to be virtual, erect and larger than the object. Where should be the position of the object?

(a) Between the principal focus and the centre of curvature

(b) At the centre of curvature

(d) Between the pole of the mirror and its principal focus.

Q. Question 2
The image formed by a concave mirror is observed to be virtual, erect and larger than the object. Where should be the position of the object?

(a) Between the principal focus and the centre of curvature
(b) At the centre of curvature
(c) Beyond the centre of curvature
(d) Between the pole of the mirror and its principal focus

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