1. I have problems finding the truth of this statement. The statement is cited from "book". I want to draw your attention to the following words: electron is decelerated 2. Statement: "Bremsstrahlung X rays result from Coulomb interaction between the incident electron and the nuclei of the target material. During the Coulomb interaction between the incident electron and the nuclei, the incident electron is decelerated and loses part of its kinetic energy in the form of bremsstrahlung photons(radiative loos)." 3. My views: electron is acelerated.