Point-particle gravitational potential for one extra dimension (bold black line) and Yukawa (red line). The Yukawa modification is taken with a range given by the present-day constraint stemming from Adelberger et al. (2009), λ = 44 μm. The dashed part of this curve corresponds to scales not tested in Adelberger et al. (2009). The extradimension potential is plotted for a value of the radius given by R = 35 μm. Our prediction is not excluded by experiments, but further improvement will soon give a definite answer. The short-scale behavior is different from the pure Yukawa modification usually searched for in experiments.