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Thread: geometry question

  1. #1 geometry question 
    Moderator Moderator AlexP's Avatar
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    Is a helix still a helix when each of its revolutions (maybe that's not an exact term) is more elliptical than circular?

    I thought of this question when I read that the world line of the earth travelling around the sun is a helix...and then later I realized that the orbit is elliptical, soo...


    "There is a kind of lazy pleasure in useless and out-of-the-way erudition." -Jorge Luis Borges
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  3. #2  
    Forum Professor river_rat's Avatar
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    Does it make a difference really Chemboy?


    As is often the case with technical subjects we are presented with an unfortunate choice: an explanation that is accurate but incomprehensible, or comprehensible but wrong.
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  4. #3  
    Moderator Moderator AlexP's Avatar
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    yeah, kind of. I'm just curious if there's another name for a helical shape that has elliptical revolutions.
    "There is a kind of lazy pleasure in useless and out-of-the-way erudition." -Jorge Luis Borges
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  5. #4  
    Forum Freshman Faldo_Elrith's Avatar
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    A helix in can be described parametically by





    where a, b, c are positive constants. If a=b you have a circular helix, otherwise you have an elliptical ellipse.
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