Which of the following could be a potential source of radiation exposure in the workplace?

X-ray machines are a recognized potential source of radiation exposure in the workplace. They operate by emitting ionizing radiation to create images of the internal structures of the body, which is a process that involves higher energy levels than typical electrical devices. While the design of these machines includes shielding and safety mechanisms to protect users and bystanders, exposure can occur if proper safety protocols are not followed or if the equipment is not well maintained. This makes awareness and training crucial for anyone working with or around X-ray technology, as the health risks associated with radiation exposure can be significant if safety measures are ignored or ineffective.

In contrast, office printers, fluorescent lights, and computers do not contribute to significant radiation exposure in the workplace. Office printers primarily use toner and do not emit ionizing radiation. Fluorescent lights produce low levels of non-ionizing radiation, which is not considered harmful at typical exposure levels. Similarly, computers emit very minimal radiation, primarily in the form of low-frequency electromagnetic fields, which are largely safe in the context of daily use. Thus, among the options presented, X-ray machines stand out as a clear source of potential radiation exposure.