The measurement of the red-shift (R-S) effect of the general theory of relativity (GTR) resorts to the existence of two essentially different kinds of metrical objects: a) the macro-corpuscules of rigid bodies and the clocks which constitute reference bodies SBAR and b) the light signals never at rest with regard to any reference body, which interconnect different regions of the metrical spacetime found by SBAR's. Our aim is to show that the comparison of frequencies of the photons emitted by atomic clocks at different spacetime regions must call for flat time continuum. Thus quantum physics which integrates the wave and the corpuscular aspects of microobjects would distinguish flat spacetime. It must be remembered that owing to its nonlocality, quantum theory is capable of reproducing stable, extended objects from the hypothetical structureless constituents. Thus it provides us with a complete theory, whereas any classical theory (h = 0), in particular the GTR, remains incomplete.
