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The focal length of a concave mirror is 50cm. Where an object be placed so that its image is two times and invertedA. 75 cmB. 60 cmC. 125 cmD. 50 cm

Answer» Correct Answer - A
(a) In case of concave mirror, m=-2
Also, `m=(f)/(f-u)`
`rArr -2=(-50)/(-50-u)`
`therefore` Distance of the object from the mirror u = -75 cm


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