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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

20 cm

B

30 cm

C

10 cm

D

40 cm

Text Solution

Verified by Experts

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