Proceedings of the American Philosophical Society Held at Philadelphia for Promoting Useful Knowledge, Том 69American Philosophical Society, 1930 |
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... light from the distant celestial objects and brings it either to the photo- graphic plate or to the human eye ... light of a distant star for example would be brought to a single point , or as near to a point as possible . The light of a ...
... light from the distant celestial objects and brings it either to the photo- graphic plate or to the human eye ... light of a distant star for example would be brought to a single point , or as near to a point as possible . The light of a ...
Сторінка 11
... light with equal accuracy means that the distance of reach of exploration is increased twice , which means that our visible universe is thus increased 2 x 2 x 2 , or the cube , or eight times . If the effective light gather- ing power ...
... light with equal accuracy means that the distance of reach of exploration is increased twice , which means that our visible universe is thus increased 2 x 2 x 2 , or the cube , or eight times . If the effective light gather- ing power ...
Сторінка 304
... light , shining through a narrow slit , to strike a photographic film wound on a revolv- ing drum . The light intensities were then read from the film in terms of the blackening after development . The analysis of such records showed ...
... light , shining through a narrow slit , to strike a photographic film wound on a revolv- ing drum . The light intensities were then read from the film in terms of the blackening after development . The analysis of such records showed ...
Зміст
Why the 200Inch Teleschope By ELIHU THOMSON | 13 |
Antarctica By ISAIAH BOWMAN | 19 |
LINE CUTS | 36 |
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