As it is known, the Schrödinger’s equation describes the electron in its natural state, represented by superimposed quantum states. This is the phase of linear unitary evolution, or U Phase. Whereas, when we carry out a measurement, it took place a reduction of the state vectors (R Process): we have the wave function collapse of the measured quantum object. The measurement, thus, produces a big changes on the physical properties of the observed particle. How do these changes happen? We don’t know. With this paper we introduce a new parameter, induced by the electro-magnetic radiation (EMR), which can help us discern the doubts about the R Process, and try to find a continuity in order to link the U Phase to the R Process, so contrasting at the moment. The new parameter is a mechanical effect induced by quanta of EMR: therefore, it is also a quantum effect. The photon is indispensable to carry out a M. No M can be carried out without using the EMR. It could be essentially the gravitational mass effect of light’s quanta to induce the wave function collapse and the Measurement Paradox and, likely, make a starting point to a correct quantum gravity.
