VOICE ON A BEAM OF LIGHT
CD 1967064 E&MP109.001
Receiving the voice from the air on a beam of light -
Engineers of WGY on the roof of General Electric's research laboratory, with special apparatus for receiving a program "narrowcasted" by light beam from the U.S. Navy's dirigible Los Angeles, flying 2,500 feet over Schenectady.
The light was picked up by a large concave mirror mounted on the tripod where small a "electric eye" converted the light waves into electrical impulses, which were converted into sound by the same means as used in an ordinary radio receiver.
Original Caption by Science Service