An optical device forms an erect image of an object placed in front of it. If the size of the image is one half that of the object,
An optical device forms an erect image of an object placed in front of it. If the size of the image is one half that of the object, the optical device is a :
(a) Concave mirror
(b) Convex mirror
(c) Plane mirror
(d) Convex lens
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Correct answer is (b) Convex mirror
Image in a convex mirror is always erect, virtual and diminished.
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