Both ultraviolet light and infrared light are forms of electromagnetic radiation and travel at the same speed in a vacuum, which is the speed of light: approximately 299,792,458 meters per second (186,282 miles per second).

The difference between ultraviolet and infrared light lies in their wavelengths and frequencies.

* Ultraviolet light has shorter wavelengths and higher frequencies than infrared light.

* Infrared light has longer wavelengths and lower frequencies.

However, the speed of light remains constant regardless of its wavelength or frequency.