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A concave morror has a focal lengh of 10...

A concave morror has a focal lengh of 10 cm. Wherer should and object be placed in front of this concave mirror so as too obtain an image which is real, inverted and same size as the object ?

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When the image fromed by a concave mirror is inverted and of the same size as the object, then the object must be placed at its centre of curvature ( C). Now, the centre of curvature of a concave mirror is at a distance of 'twice the focal length' of '2f'. Here,
Focal length, f=10 cm
`"So, "2f=2xx10 cm `
=20 cm
Thus, the object should be placed at a distance of 20 cm in front of this concave mirror.
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