can anyone explain what actually surface tension is?? I am confused about surface tension. Everywhere it is written that due to unbalance of forces at surface the molecules at boundary tend to move inwards and thus surface tends to take minimum area as possible. This is ok but it is also written that an imaginary elastic skin is created. Now why such a skin will exist due to inward forces acting on boundary mloecules?? Also on wikipedia it was written that due to surface tension surface of liquid tend to attract other surfaces. Why this would happen if boundary molecules have net inward forces on them??