Which of the following is NOT required for x-ray production?

• A. Source of electrons
• B. Source of radioactivity
• C. Means of rapidly accelerating electrons
• D. Means of rapidly decelerating electrons

Answer: (B)

Producing X-rays relies on three things: a way to supply electrons, a way to accelerate those electrons to high speed, and a target where their rapid deceleration emits photons. In an X-ray tube, heated filament provides electrons, a high voltage accelerates them toward the anode, and when they slam into the target the sudden slowdown produces X-ray photons (bremsstrahlung and characteristic radiation). A radioactive source is not required; X-rays can be generated entirely from electrical energy. The presence of radioactivity would not help produce the X-ray beam in this setup and isn’t part of the standard production process.