Word: ultraviolet
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Died. Harry Steenbock, 81, longtime (1908-56) University of Wisconsin research chemist and pioneer in vitamin D-enriched foods; of a heart attack; in Madison, Wis. In 1924, Steenbock discovered that vitamin D could be "activated" with ultraviolet rays from a quartz-vapor lamp, quickly treated milk and other foods to provide the first new source of the rickets-preventing "sun vitamin" since cod-liver oil. His patents could have made him wealthy, but instead he helped set up a foundation to handle royalties, which netted $10,000,000 for the university before a federal court in 1945 ruled...
Relativistic Implosion. Eventually, as the spacecraft approached the velocity of light, some of the stars ahead of it began to blink out; their light had been shifted into higher, ultraviolet frequencies that are invisible to the human eye. Others, like Betelgeuse and Aldebaran, which look red to observers on earth, actually became brighter: their substantial lower frequency infrared output, normally invisible to the human eye, had been shifted into the visible range...
...spectrometer takes pictures in 50 wavelengths of ultraviolet light, each invisible from the earth's surface...
...instrument builds up a picture by scanning the sun, back and forth and bottom to top, recording the intensity of ultraviolet radiation of a particular wavelength...
...kind of ions present at various levels of the sun's atmosphere depend on the temperature there. Each kind of ion, a chemical elements stripped of one or more electrons, emits a different wavelength of ultraviolet light...