Which statement correctly describes X-ray production in the dental tube?

Which statement correctly describes X-ray production in the dental tube?

• A. X-rays are produced when electrons strike the tungsten target
• B. X-rays are produced by heating the air
• C. X-rays are produced by chemical reactions
• D. X-rays are produced by magnetic alignment

Answer: (A)

X-ray production in a dental tube happens when high-energy electrons are emitted from a heated filament and accelerated toward a tungsten target. When these electrons collide with the tungsten atoms, their kinetic energy is converted into X-ray photons, primarily through Bremsstrahlung (rapid deceleration in the target’s electric field) and, to a lesser extent, characteristic radiation from inner-shell transitions. Tungsten is used because its high atomic number makes X-ray production more efficient and its high melting point lets it withstand the heat from continuous firing. The other statements don’t describe how X-rays are produced: heating air, chemical reactions, or magnetic alignment do not generate X-rays in this context.

X-ray production in a dental tube happens when high-energy electrons are emitted from a heated filament and accelerated toward a tungsten target. When these electrons collide with the tungsten atoms, their kinetic energy is converted into X-ray photons, primarily through Bremsstrahlung (rapid deceleration in the target’s electric field) and, to a lesser extent, characteristic radiation from inner-shell transitions. Tungsten is used because its high atomic number makes X-ray production more efficient and its high melting point lets it withstand the heat from continuous firing. The other statements don’t describe how X-rays are produced: heating air, chemical reactions, or magnetic alignment do not generate X-rays in this context.