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Is the electrostatic force long range or short range?


Asked by Erin Faulkner on Dec 10, 2021 FAQ



The electrostatic force is still considered a long-ranged force, but it’s contrasted with weaker intermolecular forces, such as van der Waals forces, which are considered short-ranged and are roughly described by a potential that, at long distances, goes as [math]1/r^6 [/math].
Furthermore,
The short range nanostructure regime typically extends between 1–3 nm away from surfaces, while the long range double layer regime can extend to greater than 10 nm past the short range forces, depending on the specific ionic liquid-surface combination.
Indeed, This source defines short-range forces as: Non-bonded interactions can be divided into two classes; short and long range interactions. Formally a force is defined to be short ranged if it decreases with distance quicker than r − d where d is the dimensionality of the system (usually 3).
Also,
Therefore they are so-called long-range-acting forces. For dimensional objects however, it is possible that electrostatic forces be short-range-acting. A typical example in this regard is the attraction and repulsion force between molecules. These forces are electrostatic in nature and change very fast with distance.
Besides,
In this interactions at short range are directly calculated. Interactions at long range are evaluated by interpolating the charges onto a mesh. The Poisson equation can then be solved on this mesh to calculate the potential and forces.