The image of an object, formed by a plano-convex lens at distance o...

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The image of an object, formed by a plano-convex lens at distance of \( 8 \mathrm{~m} \) behind the lens, is real and is
\( \mathrm{P} \) one-third the size of the object. The wavelength of light inside the lens is \( \frac{2}{3} \) times the wavelength in free

W space. The radius of the curved surface of the lens is
(A) \( 1 \mathrm{~m} \)
(B) \( 2 \mathrm{~m} \)
(C) \( 3 \mathrm{~m} \)
(D) \( 6 \mathrm{~m} \)
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