Word: reflector
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Dates: during 1940-1949
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...TIME, Sept. 2] that the trade secret of the fact that Barnaby was ghostwritten had been let out of the bag last week. However, in an article for my junior high-school paper I mentioned that Mr. Johnson had stopped working on the Barnaby strip. This issue of The Reflector came out last June...
...Friend observatory is as practical as any backyard astronomer could wish. The supporting base is a perpendicular concrete column, 16 feet long, anchored in bedrock eight feet below the surface on the highest hill of the orange grove. To this block is bolted the large telescope - a 16-in. reflector in a 12-ft. galvanized iron tube. On the lower side are ascension and declination meters and counterbalance weights. The observatory is roofless. A square wooden platform provides working space. The lenses were ground in a small Escondido garage-workshop...
...other major jamming method, "Window", involves the seemingly simple procedure of dropping huge quantities of light aluminum foil from planes on bombing missions. It was discovered the small strips of aluminum, which is an excellent radio reflector, would, if cut to one half a radar's wavelength, send back a disproportionately strong echo...
Radar's ability to report what it sees depends on differences in its targets' reflecting power (which engineers call the "dielectric constant"). Metal is an excellent reflector; earth, an indifferent one. Water also is a good reflector, but because of its flat surface, the radar beam caroms off at an angle and no echo reaches the receiver (except from a spot in the center of the beam); hence water appears black on the scope...
...whole earth at its mercy. Assuming that at that height a floating structure would be beyond the pull of the earth's gravity, they proposed to build a platform for launching rockets into interstellar space and for harnessing the sun's heat. By use of a huge reflector, like a burning mirror, they calculated that enough heat could be focused on a chosen area to make an ocean boil or to burn up a city in a flash. Their sun gun could also be used, they pointed out, to produce steam and electric power at global receiving stations...