This image dramatically shows the near-electrostatic potential around meta-fluorobenzoic acid. It contrasts the potential at the molecular envelope, the so-called Van er Waal's surface of the molecule, with its behavior at various radial distances. It is apparent that by 9 angstroms from the center both the potential and its surface gradient are dramatically reduced and thus illustrates that detailed knowledge of the electrostatic field at this distance is less necessary for assessing the interactions between a potential drug and its biological target.