The image of an object, formed by a plano-convex lens at a distance of \( 8 \mathrm{~m} \) behin...

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

W) times the wavelength in free space. The radius of the curved surface of the lens is
(2013 Adv.)
(a) \( 1 \mathrm{~m} \)
(b) \( 2 \mathrm{~m} \)
(c) \( 3 \mathrm{~m} \)
(d) \( 6 \mathrm{~m} \)
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