Non-Ionizing Radiation
Non-ionizing radiation is electromagnetic radiation that does not carry enough energy to ionize atoms or molecules—that is, to remove an electron completely from an atom or molecule. Excessive exposure to some forms of non-ionizing radiation can damage tissue.
Non-ionizing radiation includes ultraviolet (UV), visible light, infrared (IR), microwave (MW), radio frequency (RF), and extremely low frequency (ELF) radiation. UV radiation is non-ionizing but can still damage the skin and eyes.
Lasers commonly operate in the UV, visible, and IR frequencies.
Workers performing welding and cutting are routinely exposed to ultraviolet radiation from an arc or flame, which can injure their eyes and skin. Welders must use appropriate personal protective equipment, such as a welding helmet or hand shield with the correct filter shade, along with safety glasses or goggles.
Knowledge Check Choose the best answer for the question.
2-10. Which of the following describes non-ionizing radiation?
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