88KiB, 499x674, 62CA521473AB4625A774A25075FCA225.jpg View SameGoogleiqdbSauceNAO Anonymous Thu 19 Dec 11:24:41 2019 No.11237913 ViewReplyOriginalReport Quoted By: >>11238491 >>11238938 >>11241353 Why is ultraviolet called ultra if it's wavelength is below the visible spectrum and infrared is infra even though its wavelength is above the visible spectrum?
