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[Phys-L] Re: Area vector

----- Original Message -----
From: "Tony Wayne" <wayne@PEN.K12.VA.US>

Does any one know why the "area vector" for a surface is defined as
being normal to the plane of the surface instead of parallel to the
plane of the surface?

I don't know about the origins here (chicken and the egg), but it is
necessary for calculating vector flux, such as in Gauss' Law.


Richard W. Tarara
Professor of Physics
Saint Mary's College
Notre Dame, Indiana
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