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The focal length of a double …

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The focal length of a double convex lens is equal to radius of curvature of either surface .What will be the refractive index of the material ???

    • Posted by Mohit Sepat 7 years, 3 months ago

    CBSE > Class 12 > Physics
    • 1 answers

    Srivinayak V 7 years, 3 months ago

    Focal lenth of a convex lens is given by (t-1) 1/r1 - 1/r2.... where t is refractive index Its given that f = r1 = r2= r 1/r =( t-1) 1/r -1/r By solving it .... we will get that t= 1.5

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