Solve this:
Q.4. A square ABCD of side 1 mm is kept at distance 15 cm infront of the concave mirror as shown in the figure. The focal length of the mirror is 10 cm. The length of the perimeter of its image will be :

(A) 8 mm
(B) 2 mm
(C) 12 mm
(D) 6 mm

I hope it helps...

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Dear friend the correct ans is

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The correct answer is this

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12 mm
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I hope it helps :)

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Objeact in extended form you can't simply apply lateral magnification on that. You have to find the answer through the co ordinate system.. that's why object in form of square and image will be rectangle
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What are you looking for?