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Help with radius of curvature

  1. Mar 11, 2012 #1
    What exactly is the radius of curvature of an object? And how would this be applied to a question such as the following:

    A glass porthole of a submerged craft has parallel curved sides, both of radius of curvature R. What would R be in order that an object in the water 2m away from the porthole should appear undisplaced to an observer inside the craft? Refractive index of water: 4/3, glass: 3/2, air: 1
     
  2. jcsd
  3. Mar 12, 2012 #2

    Drakkith

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    Staff: Mentor

    Does this help:http://en.wikipedia.org/wiki/Radius_of_curvature_(optics [Broken])

    Basically its the radius of the circle the curve of the surface would make.
     
    Last edited by a moderator: May 5, 2017
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