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    MyNameIsYoda's Avatar
    MyNameIsYoda Posts: 1, Reputation: 1
    New Member

    Aug 24, 2009, 08:05 PM
    Physic-Optics, finding refractive index
    How do I find the refractive index of a plano-convex lens (in air) when given the focal length and radius of curvature?
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
    Uber Member

    Aug 25, 2009, 02:30 AM

    Take a look here:
    Focal length - Wikipedia, the free encyclopedia

    The formula is :

    Since your lens is a planoconvex one, I guess you'll have to take the other 'radius' to be infinite. Let the 'other radius', which is the flat part be R_2

    I'm not sure for that one though. :o

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