A double convex lens has equal curvature radii of 35 cm an
A double convex lens has equal curvature radii of 35 cm. An object placed 30 cm from the lens forms a real image at 136 cm. What is the refractive index of the lens?'
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a double convex lens has equal curvature radii of 35 cm an object placed 30 cm from the lens forms a real image at 136
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