FIG. 1: Fig.1. Left: a particle is illuminated from below by light of wavelength λ , which scatters into the microscope whose objective lens subtends an angle of 2 ϕ . Right: the particle nature of the scattering is emphasized, with an effective separation r$_{ef}$ shown. FIG. 2: The position uncertainty due to the standard UP and the additional gravitational effect embodied in the GUP. The minimum uncertainty occurs at about twice the Planck length. FIG. 3: A light pulse is sent from A and reflected back from B. Its energy causes a distortion of the spacetime between A and B and hence affects the length l . 21