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What is the most commonly used scale of sharpness?

  1. Jan 25, 2004 #1
    What is the most commonly used scale of sharpness? Does anyone know a webpage with examples of the comparitive sharpness of various things?
     
  2. jcsd
  3. Jan 26, 2004 #2

    russ_watters

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    Staff: Mentor

    Sharp as in like a knife? I've never heard of one, but I'd imagine the best way to compare would be by the width of the edge.
     
  4. Jan 27, 2004 #3
    Re: Sharpness

    This is an interesting question.
    As the width of the leading-edge would determine a degree of sharpness(as russ keenly pointed-out), I would imagine that the factor of edge-hardness or application durability would likewise be a key factor.
    Given that, I would suppose that sharpness is relative.
    For example, a "sharp knife" is only "sharp" if it cuts that which it contacts; in this sense of the term.
    So, a "knife" which has a much finer leading-edge width but far less durability might well do little "cutting" and perhaps not even go through a stick of butter. Would this not be considered "less sharp"?
    Just my thoughts.
     
  5. Jan 28, 2004 #4
    Re: Re: Sharpness

    :P
     
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