An object's size and its image's size is the same in a mirror. What could be the type of mirror?

Plane

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Concave

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Convex

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Either plane or concave

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Solution

The correct option is D
Either plane or concave

The image formed by a plane mirror is always erect and of the same size as the object.
Also, if an object is at the geometric centre of the concave mirror (also known as centre of curvature), then the image will be real, inverted and of the same size as the object.
Hence the mirror could be a concave or a plane mirror.

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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.

Question 1

Boojho and Paheli were given one mirror each by their teacher. Boojho found his image to be erect and of the same size whereas Paheli found her image erect and smaller in size. This means that the mirrors of Boojho and Paheli are, respectively

(a) plane mirror and concave mirror.

(b) concave mirror and convex mirror.

(d) convex mirror and plane mirror.

Q. When an object is near a plane mirror, the image is erect, virtual and of the same size at the object. A concave mirror gives a magnified and erect image of a nearby object whereas a convex mirror gives an erect and diminished image. For the rear view mirror in a car.

A real and enlarged image can be obtained by using a :

(a) convex mirror

(b) plane mirror

(d) either convex or plane mirror.

A real image of an object is to be obtained. The mirror required for this purpose is : (a) convex (b) concave (c) plane (d) either convex or concave

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