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We wish to obtain an erect image of an object, using a concave mirror of focal length 15 cm. What should be the range of the distance of the object from the mirror? What is the nature of the image? Is the image larger or smaller than the object? Draw a ray diagram to show the image formation in this case.

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An erect image is formed by a concave mirror, only if the object is placed between the pole and the principal focus of the mirror (i.e, range of object distance between  0 and 15 cm. i.e., 0 < u < 15 cm.)
Nature: The image is virtual.
Size of Image: The image is larger than the object. The ray diagram is shown
in  figure.

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