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Projection of vectors and scalars

  1. Sep 18, 2009 #1

    I was wondering if someone can explain what projection of vectors and scalars mean. I read a lot of site but they fail to give me a clear explanation. Thanks.
  2. jcsd
  3. Sep 19, 2009 #2


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    Science Advisor

    Projection of scalars doesn't mean anything, as far as I know. To project one vector, u, on another, v, drop a line perpendicular to from the tip of u to v. The projection of u on v is the vector from the base of v to that point.

    To see the reason for the name, imagine that there is a light shining from behind u toward v. The "projection of u on v" is the shadow[/b] of v in exactly the same way a movie film is projected on the screen.
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