The image formed by a concave mirror is at [[1]] if the object is placed at focus.

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Detailed Solution

The image formed by a concave mirror is at infinity if the object is placed at focus.
Concave mirrors create an image that is larger than the actual thing. Therefore, a concave mirror creates an image of the thing that is enlarged. When an object is put between a concave mirror's pole and focus, an image larger than the object and behind the mirror is created. However, a real, inverted, and magnified picture is created at infinity when an object is in the mirror's focus. Dentists make use of concave mirrors. Convex and concave mirrors are the two varieties of mirrors.
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