Bremsstrahlung X-ray production involves the conversion of which type of energy of electrons into electromagnetic radiation?

• A. Potential
• B. Kinetic
• C. Thermal
• D. Chemical

Answer: (B)

Bremsstrahlung X-ray production occurs when fast electrons enter the target and are decelerated by the strong electric field of the nuclei. The energy the moving electron carries—its kinetic energy—is converted into electromagnetic radiation as it loses momentum. Because the deceleration can vary, the emitted photons form a continuous spectrum, with photon energies up to the electron’s initial kinetic energy (set by the tube voltage). This is different from characteristic radiation, where photons come from specific electronic transitions. So the energy being converted into X-ray photons is the electron’s kinetic energy, not potential, thermal, or chemical energy.