Exploring the Universe
— New Use for Beam Radio R410 waves of the beam type may be utilised in the near future to ediplore the outer reaches of space ancd aus solve some of the secrets of the SMiiverse. Senator Marconi in a recent address in, Italy expressed the belief that beam waves travel far beyond the layer of air surrounding the earth, thus differing from the two kinds of radio waves that are purely terrestrial. These are, firstly, the ground wave that follows the surface of the earth, and, secondly, the sky wave, which is reflected from the "heaviside layer" of ionized air some 100 miles above the earth. Just how far beam waves would travel in space is at present purely eonjectural, but some estimates vary $.tr0m 25 to 48 millions of miles. This is a comparatively short range, when judged by distances separating heayenly bodies, but it would reach many planets that are near neighbours. of the earth.
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https://paperspast.natlib.govt.nz/periodicals/RADREC19310102.2.52
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Radio Record, Volume IV, Issue 25, 2 January 1931, Page 15
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160Exploring the Universe Radio Record, Volume IV, Issue 25, 2 January 1931, Page 15
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