NEW INVISIBLE RAY
BUT IT PENETRATES FOG Greater safety for aviators in fogs and less likelihood of train collisions are promised through tne application of rays of light invisible to the eye, yet capable of actuating signals miles away, from their source. According to an electrical research worker, these rays could be projected 30 miles into space and controlled as to direction. Their function in guiding the planes would be to register signals on a photo-electric cell mounted on the pilot’s instrument board. For the purpose of this signalling, the inventor is said to have devised a special tube which is said to become fluorescent, in response to the controlled rays. Adapted to railway use, the cell would show light only at the close approach of another train.
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https://paperspast.natlib.govt.nz/newspapers/SUNAK19300108.2.119
Bibliographic details
Sun (Auckland), Volume III, Issue 865, 8 January 1930, Page 11
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128NEW INVISIBLE RAY Sun (Auckland), Volume III, Issue 865, 8 January 1930, Page 11
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