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As radio- wave generator this circuit is still at the heart of all radio— television
broadcasting. Armstrong's priority was later challenged by De Forest in a
monumental series of corporate patent suits, extending over 14 years, argued
twice before ...
On the average, a radio-frequency photon is emitted by an undisturbed, excited
atom every 11,000,000 years: the transition is very infrequent; that is, it is highly "
forbidden." Nevertheless, in practice, the line is readily detected in any direction,
The turbulent Crab Nebula is a radio and X-ray source within the Galaxy, and the
nebula and the pulsar discovered in it in 1968 are remnants of a supernova seen
in AD 1054. The Crab pulsar is unique in having been detected in light and ...
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LibraryThing ReviewUser Review - keylawk - www.librarything.com
This is the 198215th Edition, in two halves, with the Macropaedia and the Micropaedia. First published in 1768, the publisher is the oldest English-language encyclopedia still in print. Two Scottish ... Read full review