<prompt> E diriša quantum tunneling phenomenon, yeo e dumelelago dikarolwana go feta ka gare ga lepheko leo ka tlwaelo le ka se kgonego go feta. Electrons tunnel ka gare ga lepheko magareng ga di planar metal electrodes, yeo e nngwe le e nngwe e nago le atomo ya adsorbed, yeo e fanago ka tunneling-current density yeo e ka lekwago. Go sekaseka atomo e tee e tšewago bjalo ka ntlha ge e feta e nngwe sample e dumelela go ngwalolla displacement versus lateral separation for a constant current. The calculation shows the extent to which scanning-tunneling-microscope images of an individual atom are visible. It confirms that for the microscope, the quantum tunneling phenomenon, which allows particles to pass through a barrier that would normally be insurmountable.  <response>: athomo 