Which of the following is NOT a type of optical protection light?

The choice indicating that X-ray is not a type of optical protection light is accurate because optical protection lights are generally associated with the electromagnetic spectrum's portion that includes ultraviolet, infrared, and visible light.

Optical protection light refers to forms of light that can be seen and managed within the visible spectrum, or slightly beyond it, such as ultraviolet and infrared light, which are commonly used in various applications like safety goggles, sunglasses, and other protective gear to shield the eyes from potentially harmful radiation.

X-rays, on the other hand, fall under a different part of the electromagnetic spectrum and are used primarily in medical imaging and other industrial applications. They have a much higher frequency and energy than the other types of light mentioned, making them suitable for specific diagnostic purposes rather than for protection in the context of optical light. Therefore, recognizing that X-ray is vastly different in application and nature supports the understanding of what constitutes optical protection light.