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(A) For a concave mirror,the radius of curvature $R$ is equal to $2f$. The object distance $u = -R = -2f$. Using the mirror formula $\frac{1}{v} + \fr

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(A) For a concave mirror,the radius of curvature $R$ is equal to $2f$. The object distance $u = -R = -2f$. Using the mirror formula $\frac{1}{v} + \frac{1}{u} = \frac{1}{f}$,we substitute $u = -2f$: $\frac{1}{v} + \frac{1}{-2f} = \frac{1}{-f}$ $\frac{1}{v} = \frac{1}{2f} - \frac{1}{f} = -\frac{1}{2f}$ Thus,$v = -2f = -R$. The image is formed at the same position as the object (the centre of curvature). Since the image is formed in front of the mirror,it is real and inverted,and its size is equal to the size of the object.

The distance of an object from the pole of a concave mirror is equal to its radius of curvature. The image must be:

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