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In the figure shown consider the first reflection at the plane mirror and second at the convex mirror .AB is object. |
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Answer» The second image is REAL ,inverted of `1//5^(th)`magnification for image by convex mirror Distance of image of `A'`is `v_(A)` `(1)/(v)+(1)/(u)=(1)/(f)` `(1)/(v_(A))+(1)/(-60)=(1)/(60) rArr v_(A)=-30cm` Distance of image of `B'` is `v_(B)` `(1)/(v_(B)) +(1)/(-90)=(1)/(60)` `(1)/(v_(B)) =(1)/(60)+(1)/(90) rArr (1)/(v_(B))=(5)/(180)` `v_(B)=36cm` `m=("length of image")/("length of object")=(6)/(30)=(1)/(5)` Distance of image increases with convex mirror. |
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