Science: All the World's a (TV) Stage

Prospects of worldwide television transmission are looking up. At last week's "scatter propagation" conference at George Washington University, electronics engineers were enthusiastic about the recently declassified techniques for transmitting "line-of-sight" waves much farther than the horizon.

Long radio waves can be used to send code and voice across the oceans because they are deflected downward by ionized layers in the atmosphere, and therefore follow the curve of the earth. They cannot be used for television chiefly because they do not offer a wide enough band of frequencies. The shorter waves, including those that are used for TV, pass through the ionized layer...

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