Word: infra
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...scrutinize its target at the end of its long voyage, the spacecraft carried two radiometers, one of them sensitive to radio microwaves, the other to infra-red rays. Each type of radiation behaves differently when passing through clouds or gases; the frequencies were selected to tell as much as possible about the temperature of Venus and the nature of its atmosphere...
Readings on the two infra-red wave lengths were essentially identical. This could be interpreted to mean that there were no breaks in the Venusian clouds and that the infra-red waves came from a high, opaque cloud deck. The amount of carbon dioxide above this deck was too small to be detected...
...Coca-Cola, whose secret ingredient, called 7-X, is shipped to Coke bottlers all over the world; its exact proportions defy successful analysis by such modern techniques as chromatography and infra-red spectrum analysis...
...grotesque orange lighting that made us look like a jack o'lantern. We noticed several conveyor belts passing into and out of the room through openings in the walls. Mr. Whiteside pointed out that it was unbearably hot, and we agreed that it was with little hesitation. These are infra-red heating lamps," he told us, "temperature of 88 degrees. Dehumidifiers keep the moisture down to two per cent--that's lower than Death Valley." We started to ask why Central Kitchen wanted to maintain a virtual desert in its midst, but just then Mr. Whiteside called our attention...
Alien Planet. The probe was already close to Venus when it opened its instrument eyes: an infra-red and a microwave detector. Both of them worked perfectly. Instantly Mariner's radio came alive and began relaying the secrets of Venus to earth, where they were typed in code. In Washington a spokesman for the -Aeronautics and Space Administration announced jubilantly: "We are currently scanning and gathering data from the planet." Then the Jet Propulsion Laboratory at Pasadena, which built Manner II, relayed its actual voice-an eerie, organ-like music. It would take several weeks to turn the signals...