an object is placed at a distance of 15cm from a concave mirror. The mirror produces 3 times magnified image behind the mirror, find the focal length of the mirror. Also draw Ray diagram for it.
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Answer: f= -11.25 cm
Explanation:
Explanation is in image
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![](https://hi-static.z-dn.net/files/ded/2e6eff034cb2fdf8f58316dba952e4ee.jpg)
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