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The causal quantum mechanics (i.e. Bohmian or de Broglie-Bohm or Bohm-deBroglie quantum mechanics) has made possible to calculate the trajectories ofelectrons in a typical double-slit experiment [C. Philippidis et al., Il NuovoCimento, 52 B, 15-28 (1979)]. The trajectories do not correspond to an uniformmovement but to an accelerated one. The acceleration is caused by the quantumpotential. From the quantum theoretical point of view, there is a probabilityfor the electron to emit photons, with a certain emission power, during itsmovement from the slits to the screen. We find a quantum general formula forthe emission power of photons, valid independently of the interpretation. Then,according to the Copenhagen interpretation, this formula gives a strictly zerovalue for the emission power because the electron moves as a free particleafter it leaves the slit and before reach the screen. Then, there is noemission of photons. In the case of the causal interpretation, the emissionpower results, for a concrete real experiment, in a very tiny but not a zerovalue, driven by the square of the quantum potential gradient. We give an ideaof the type of spectrum that could be measured. A brief idea of a possibleexperimental arrangement in order to detect this effect, is given.

On a new prediction of Causal Quantum Mechanics for the two-slit interference experiment with electrons