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[qquad (1)/(B)(C)/(OR)],[" Doubled conve...

[qquad (1)/(B)(C)/(OR)],[" Doubled convex lenses are to be manufactured from a glass of refractive index "1.55," with both "],[" faces of the same radius of curvature.What is the radius of curvature required,if the focal length is "],[" to be "20cm?]

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A double convex lens is made of glass of refractive index 1.55 with both faces of same radius of curvature. Find the radius of curvature required, if focal length is 20 cm .

A double convex lens is made of glass of refractive index 1.55 with both faces of same radius of curvature. Find the radius of curvature required, if focal length is 20 cm .