FOs are usually described as a "standing wave" decaying oscillatory disturbance of electron density . However, this definition can be somewhat misleading since it does not explicitly specify that the said disturbance is not a function of time. As will be shown later, Friedel oscillations (FO) only depend on the metal and the charged particle above it, and its charge and distance from the surface. Therefore, we believe that a proper definition of Friedel oscillations is a decaying electron density redistribution in a wave-like pattern.