Word: searchlights
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...quantity for troops in the field. And once on active duty, the new sighting devices should prove to be a marked advance over the famed snooperscopes that were so useful in World War II. The trouble with the snooperscopes was that they needed their own light source -a searchlight that illuminated targets with an infra-red beam. That was invisible to the naked eye but could easily be seen by an enemy equipped with relatively simple detection devices. The snooperscope sniper often found himself a sitting duck, his, own infra-red searchlight pinpointing his position...
...like New England reticence, the hidden vein of pure joy or grief beneath. In the small encounters that he chronicles, a clash of two points of view or a strange moment of fear is often apprehended with a sudden, minute clarity, like two specks of dust frozen in the searchlight of a morning shaft...
Pulsed Beam. Working in an all but echoless 10-ft. by 13-ft. room lined with sound-absorbing wedges of glass fiber, Lockheed's scientists have set up a sort of searchlight with a sound generator in its throat. The researcher sits in a chair, covers his eyes with a blindfold and presses a button with his right hand. Out of the searchlight comes a beam of noise, 50 pulses per second, which sounds like a distant chorus of crickets and spring peepers. The mixed frequencies are higher than human ears normally hear, but the researchers have found that...
Time to Dive. And not all flares, says Van Allen, shoot particles to the earth. They must be near the western edge of the sun or just beyond it. The particles do not move in straight lines like the beam of a searchlight. Affected by the sun's magnetism they move in complicated curves and may hit a spacecraft from many directions. For this reason, says Van Allen, a spacecraft cannot be sheltered by simply putting an umbrellalike shield between...
...arsenide diode, only 0.01 in. in diameter, was placed precisely at the focus of a 5-in. reflecting telescope that concentrated its infra-red light into a tight bundle. On the roof of the lab, the researchers set up their receiver-the reflector of a 5-ft. war-surplus searchlight with a sensitive photocell at its focal point...