Diagnostic X-ray beams are described as heterogeneous, polyenergetic, or polychromatic due to which interaction?

• A. Coherent
• B. Comptom
• C. bremsstrahlung
• D. characteristic

Answer: (C)

Bremsstrahlung is the braking radiation produced when high‑speed electrons are decelerated by the electromagnetic field of nuclei in the target. This deceleration can emit photons with a broad range of energies, from near zero up to the electron’s initial energy, creating a continuous spectrum. That continuous spectrum makes diagnostic X‑ray beams heterogeneous or polyenergetic. Charateristic radiation from inner-shell transitions adds some discrete-energy photons, but the overall beam remains broad mainly due to bremsstrahlung. Coherent and Compton scattering describe how photons interact with matter after emission and do not establish the beam’s initial energy distribution.