Exploring Space
‘With Infra-Red Rays" ACCORDING to an eminent American radio engineer, recent research. in connection with infra-red radiation and high frequency. radio wayes ‘has. indicated that communication _ with. the various planets is theoretically possible, Ordinary radio waves cannot be" émployed for this purpose, as the ionised air (the Kenelly-Heaviside layer) in the. upper atmosphere reflects them back to the earth. Radio waves only a few inches long can now be generated, and these easily. penetrate the Kenelly-Heaviside layer. The infra-red rays can also penetrate the atmosphere of the earth and other planets without scattering. The receiving apparatus for infra-red rays consists principally of a sensitive cell, so sensitive, in fact, that a high-pow-ered searchlight operating on the moon could be recorded on the earth: a
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https://paperspast.natlib.govt.nz/periodicals/RADREC19310130.2.45
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Radio Record, Volume IV, Issue 29, 30 January 1931, Page 15
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126Exploring Space Radio Record, Volume IV, Issue 29, 30 January 1931, Page 15
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