Agradecimentos: We would like to thank L. Mandel for clarifying several points for us and to 0. Pessoa Jr. for reading the manuscript and making several corrections. We also would like to acknowledge financial support from State Research Foundation of São Paulo (FAPESP) and the National Research Council of Brazil (CNPq) Ver menos

Abstract: We describe a variation of Franson's Experiment to test a sub-class of the physical viewpoints which imagine that a photon is in some sense an extended object compared to the size of the apparatus, or which assume that there is a kind of back-action between the distant detectors. These are realistic theories which imagine that the collapse of the wave packet is physical. It will test such theories with any transmission velocity whatsoever. The sub-class includes theories for which the extended object or collapse is confined to the physical paths in the experimental apparatus and does not exist between the paths Ver menos