area of interface
In all measurements it is desirable that quantities like the charge and the capacity
be related to unit, true, surface area of the interface
. While this is relatively simple for a liquid-liquid interface
, there are great difficulties when one phase is solid. In any report of these quantities
it is essential to give a clear statement as to whether they refer to the true or
the apparent (geometric) area and, especially if the former is used, precisely how
it was measured.