The New Encyclopaedia Britannica, Volumes 1-10Encyclopaedia Britannica, 1974 - Reference [1] Propaedia: outline of knowledge and guide to the Britannica.--[2]-[11] Micropaedia: ready reference and index.--[12]-[30] Macropaedia: knowledge in depth. |
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Page 36
... 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 , extend- ing over 14 years ...
... 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 , extend- ing over 14 years ...
Page 245
... radio - frequency pho- ton 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 ...
... radio - frequency pho- ton 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 ...
Page 252
... radio observations . H II regions emit thermal noise because of the electrical interaction of protons and electrons , but there is general background radio noise from the Milky Way , the continuous spectrum of which indicates a whol- ly ...
... radio observations . H II regions emit thermal noise because of the electrical interaction of protons and electrons , but there is general background radio noise from the Milky Way , the continuous spectrum of which indicates a whol- ly ...
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The New Encyclopaedia Britannica, Volumes 1-10 Encyclopaedia Britannica Publishers, Inc. Staff No preview available - 1974 |
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