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A convex mirror has radius of curvature ...

A convex mirror has radius of curvature of 20 cm. An object is placed at such a distance from the mirror that the size of image is exactly half that of the object. The object must be at :-

A

20cm

B

30cm

C

10cm

D

40cm

Text Solution

Verified by Experts

The correct Answer is:
C
`f=10,m=f/(f-u)`
`m=1/2impliesu=-10`
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