State where an object must be placed so that the image formed by a concave mirror is:

(a) erect and virtual.
(b) at infinity.
(c) the same size as the object.

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Solution

(a) For the image formed by a concave mirror to be erect and virtual, the object must be placed between the pole and the focus.
(b) For the image formed by a concave mirror to be at infinity, the object must be placed at the focus.
(c) For the image formed by a concave mirror to be of the same size as the object, the object must be placed at the centre of curvature.

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State where an object must be placed so that the image formed by a concave mirror is: (a) erect and virtual. (b) at infinity. (c) the same size as the object.

State where an object must be placed so that the image formed by a concave mirror is:

(a) erect and virtual.
(b) at infinity.
(c) the same size as the object.