Century Dictionary and Cyclopedia
- Beyond the red: used of the invisible heat-rays, less refrangible than those forming the lower or red part of the spectrum, more commonly called the infra-red rays. See spectrum.
- adj. dated infrared
GNU Webster's 1913
- adj. (Physics) Situated beyond or below the red rays.
- ultra- + red (Wiktionary)
“Its main console was installed in a specially designed executive office, mounted on an enormous executive desk of finest ultramahagony topped with rich ultrared leather.”
“Mascart, and others, adds much to our knowledge of the sun; while the photographs of Abney in the ultrared increase our information in a direction less expected and certainly less easy of attainment.”
“Investigations have been made as to whether different conditions of aggregation affect atoms and molecules, and the molecular conditions in electrolytic dissociation and the ultrared absorption spectrum of crystals have been studied.”
“The ultrared spectrum, in the form of the Raman-lines, is moved up to that region and, in consequence of that, exact measurements of its lines can be effected.”
“In this case these new lines group themselves round the incoming primary frequency on either side of it, and the distance between the activating frequency and the nearest Raman-lines will be identical with the lowest oscillation frequencies of the atom or with its ultrared spectrum.”
“So far, indeed, there have been all but insuperable difficulties in the way of studying these ultrared oscillations, because that part of the spectrum lies so far away from the region where the photographic plate is sensitive.”
“In this way we get the ultrared spectrum moved up to the spectral line of the activating light.”
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