3-D Home TV Foreseen?—,
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?The pace of new developments in the recently revived method of photography known as holography is so fast that three-dimensional television sets portraying life-size scenes could be a reality before 1984,
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, as was predicted in George Orwell’s novel…. A hologram is a recording of an interference pattern reflected from an object. From this recording, the object can be reconstructed visually in a three-dimensional form.?— Science News, June 11,
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, 1966
UPDATE
Television viewers are still waiting for the 3-D revolution. Although 3-D TVs went on sale in the United States and elsewhere in 2010, they have yet to take off. Most sets require special glasses or have limited viewing angles, and none use holography to create the illusion of depth. Scientists haven’t given up,
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, though. Using innovative plastic screens, researchers are projecting small holographic movies in real time (SN: 12/17/11,
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, p. 1
. The enormous bandwidth and processing power needed to transmit and display the images are still huge barriers to making Orwell’s vision a reality.
Tasteless,
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. Invisible to the eye. Air contaminants less than a tenth the size of a pollen grain are nevertheless dangerous.
Even on a clear,
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, sunny day, many tens of thousands — and potentially millions — of tiny particles cloud every breath you take. Some are nearly pure carbon. But reactive metals, acids,
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, oily hydrocarbons and other organic chemicals jacket most of these motes.
Epidemiologists have been calculating human tolls by comparing how many people die when particle numbers in the air are high against mortality figures on cleaner days. Over the past couple of decades, those data have been implicating tiny airborne particles in the deaths of huge numbers of people each year — even where concentrations of these microscopic contaminants never exceed levels permitted by U.S. law.
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