Quantum Mechanics considers the duality wave-particle through the interpretation proposed by de Broglie. The diffraction has been detected for the elementary particles, as electrons, protons, neutrons, and molecules. Considering these experiments, I show here that there is a grave incompatibility between this solution of Quantum Mechanics and the Michelson-Morley experiment if we replace light by protons, and Michelson?s interferometer is replaced by a crystal. The paper proposes a solution able to eliminate such an incompatibility.
The Michelson-Morley Experiment for Protons