The surface tension of a liquid is defined as the tangential force per unit length, acting at right angles on either side of an imaginary line on the free surface of the liquid.
If F is the force on one side of a line of length Z, drawn on the free surface of a liquid, the surface tension (T) of the liquid is
T = \(\frac{F}I\)
Concept of surface tension
The CGS unit of surface tension : The dyne per centimetre (dyn/cm) or, equivalently, the erg per square centimetre (erg/cm2).
The SI unit of surface tension : The newton per metre (N/m) or, equivalently, the joule per square metre (J/m2).
