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The focal length of a concave mirror is ...

The focal length of a concave mirror is 50cm. Where an object be placed so that its image is two times and inverted

A

75 cm

B

60 cm

C

125 cm

D

50 cm

Text Solution

Verified by Experts

The correct Answer is:
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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