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  1. Oct 22, 2005 #1
    Spherical mirrors, no problem, are easier to manufacture. But


    is it difficult to manufacture/produce a parabolic mirror?

    e.g., something like parabolic reflector with a focus about a meter from the vertex,
    and about half a meter in diameter?
  2. jcsd
  3. Oct 23, 2005 #2
    Spherical mirrors have a constant curvature. During manufacture and finished polishing, it makes things simple.
    Parabolic mirrors do not have a constant curvature, and though this differential curvature is easy to mathematically define, the manufacture and polishing can be tricky and expensive(depending on the "tolerance" of perfection desired)
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