Which of the following is an example of ionizing radiation commonly encountered in BEA settings?

• A. X-ray
• B. UV lamp
• C. RF/microwave
• D. Visible light

Answer: (A)

Ionizing radiation has enough energy to eject electrons from atoms, creating ions and potentially causing biological damage. X-ray photons carry energies in the keV range, well above the threshold that ionizes atoms, so they are classic examples of ionizing radiation encountered in BEA settings such as medical imaging and industrial radiography, where safety programs rely on shielding and dosimetry. The other options involve non-ionizing radiation: UV lamps mostly fall into non-ionizing ultraviolet energy and can cause photochemical damage rather than ionization; RF/microwave and visible light do not have enough energy to ionize atoms and primarily cause heating or photochemical effects rather than ionization. Thus, X-ray is the correct example.