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infrared vs. ultraviolet

infrared

[in-fruh-red] / ˌɪn frəˈrɛd /

Or infra-red

noun

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.

adjective

noting or pertaining to the infrared or its component rays.

infrared radiation.

ultraviolet

[uhl-truh-vahy-uh-lit] / ˌʌl trəˈvaɪ ə lɪt /

adjective

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.

an ultraviolet lamp.

noun

ultraviolet radiation.