What is the difference between an ordinary stretched elastic membrane and that of the free surface of liquid?
Ordinary stretched elastic membrane obeys Hooke’s law i.e., tension increases with stretching while tension in the liquid does not increase on increasing the area. When the elastic membrane is stretched, the separation between the molecules increases.
In case of liquid when surface area is increased the molecules move from bulk to surface film and the distance between the molecules remains constant.
119 Views