infrared vs. ultraviolet

the part of the invisible spectrum that is contiguous to the red end of the visible spectrum and that comprises electromagnetic radiation of wavelengths from 800 nanometers to 1 millimeter.

noting or pertaining to the infrared or its component rays:

beyond the violet in the spectrum, corresponding to light having wavelengths shorter than 4000 angstrom units.

pertaining to, producing, or utilizing light having such wavelengths:

ultraviolet radiation.