| Show Man-Made Man Light in May Turn Nights Into Days A plan for Illuminating large areas orens of country by means of projecting radio waves upward has hus been evolved by Prof V. V V A. A Bailey Dalley head of the tho experimental physics department at the University o ot of Sydney Bailey Dalley said the scheme was to create a huge nuge electric discharge in regions about 60 80 miles above the th earth The principle was t to that employed In mercury and oth other other er vapor lamps and neon tubes but bu buno no connecting wires or glass cove cove- would be used If sufficient energy was supplied the area illuminated would be square miles and the Intensity o othe of the light would be similar to that of full moonlight on a clear night The light would have the appear appearance ance of emanating from a 0 glowing cloud about 10 times as large as tile the moon In effect It would bo be boon boan bean an on artificially created aurora The light might ml ht be slightly colored per per- perhaps perhaps haps pink Bailey Dalley Da illY said sa Id that tha t for the 5 square miles about kilo kilowatts kilowatts watts would be required to produce an illumination on the ground equal to that required for roadway light light- Ing That was a large amount of energy but Its use might be justified justl justi fled fied for certain commercial or mill mili military tary purposes A noticeable effect however could be produced in the sky with even kilowatt radio transmit transmit- transmitters An array of aerials about a amile amile amile mile square would have to be pro provided vided which would be able to radi radl radiate radiate ate the energy at a 0 suitable wave wove wavelength wavelength length in a narrow vertical beam Apart Aport from any ony commercial or military value the scheme might have Bailey Dolley said It would have hove Important scientific value ns os It would enable controllable spectra spectroscopic and other investigations to tobe tobe tobe be made of the atmosphere at heights of 60 80 miles or more |
