Proceedings of the American Philosophical Society Held at Philadelphia for Promoting Useful Knowledge, Том 69American Philosophical Society, 1930 |
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Сторінка 424
... lines is due to the lack of absolute sharpness in the tuning of the atoms . An atom responds slightly to light of frequencies considerably different from exact resonance , and if enough atoms are pres- ent per unit column in the line of ...
... lines is due to the lack of absolute sharpness in the tuning of the atoms . An atom responds slightly to light of frequencies considerably different from exact resonance , and if enough atoms are pres- ent per unit column in the line of ...
Сторінка 435
... lines , and ( 2 ) in the heights , measured in kilometers , to which each line ascends . The intensities in the ... lines are much stronger in the chromospheric spectrum than they are in the sun . As the same lines are much stronger ...
... lines , and ( 2 ) in the heights , measured in kilometers , to which each line ascends . The intensities in the ... lines are much stronger in the chromospheric spectrum than they are in the sun . As the same lines are much stronger ...
Сторінка 438
... lines in the iron spectrum , both strong and weak , throughout a great range of wave - lengths . Recent work by ... lines of iron , being those of low excitation potential , reach the greatest heights . For these lines the red shift is ...
... lines in the iron spectrum , both strong and weak , throughout a great range of wave - lengths . Recent work by ... lines of iron , being those of low excitation potential , reach the greatest heights . For these lines the red shift is ...
Зміст
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THE AMERICAN PHILOSOPHICAL SOCIETY HELD AT PHILADELPHIA | 17 |
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