Fig.10.  Diffraction of light at an edge.

A.  Photograph of Fresnel diffraction at a straight edge.

B.  Graph indicating intensity versus distance along a line perpendicular to the edge.

C.  Evidence for i-pretons is proposed to occur beyond diffracted illumination lines that are produced separately by a common point source.  Edges are adjusted so that illumination lines are brought into juxtapositions but do not overlap.  The production of photons in the non-overlap zone upon the simultaneous exposure to a common point source would be evidence of i-pretons.  An i-preton is a segment of a pulson that by itself does not have sufficient energy to create a photon.