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![[Post New]](/templates/default/images/icon_minipost_new.gif) 20 Jul 2007 21:32:05 IST
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I think gomurali is right. Let us divide the surface of the liquid into two parts by an imaginary line. Let one part attract the other with a force F. If the length of the imaginary line be L then surface tension S = F/ L.
Caution: Surface tension is a confusing topic and even authors of different textbooks don't have a common opinion. For example, in Concepts of Physics, surface tension is given as tangential to the surface and lying on the surface (gomurali's view), while in OP Tandon's Physical Chemistry, it is given as going into the liquid (krishna gopal's view). However, it can be seen that the former is correct and not the latter, as, the relation of surface tension with surface energy can be derived and is valid only if the former viewpoint is accepted.
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