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Lateral magnification of an object by spherical mirror is 0.3. If focal length of mirror is 30 cm, find type of mirror. |
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Answer» concave `m=(F)/(f-u)=(f-v)/(f)` (1) `m=(f)/(f-u)` `therefore 0.3 =(30)/(30-u)` `30-u=100` `therefore u=-70` cm `m=(f-v)/(f) `therefore 0.3=(30-v)/(30)` `therefore 9 =30-v` `therefore v=21` cm `therefore` IMAGE obtained behind the mirror, hence convex. |
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