 | Royal Institution of Great Britain - 1869 - 636 pages
...however intense a luminous beam may be, it remains invisible unless it has something to shine upon. Space, though traversed by the rays from all suns and all stars, is itself unseen. Not even the sether which fills space, and whose motions are the light of the universe, is itself visible. You notice... | |
 | 1869 - 898 pages
...however intense a luminous beam may be, it remains invisible unless it has something to shine upon. Space, though traversed by the rays from all suns and all stars, is itself unseen. Not even the sether, which fills space, and whose motions are the light of the universe, is itself visible.' And... | |
 | James Samuelson, Henry Lawson, William Sweetland Dallas - 1870 - 510 pages
...however intense a beam of light may be, it remains invisible unless it has something to shine upon. Space, though traversed by the rays from all suns...fills space, and whose motions are the light of the universe, is itself visible." We take the foregoing, as one of the most striking of the novelties in... | |
 | John Tyndall - 1871 - 408 pages
...are caused to vibrate more rapidly than the waves which fall upon them ; the periods of the waves arc quickened by their impact on the atoms. The refrangibility...motions are the light of the world, is itself visible." * * " Proceedings of the Royal Institution," vol. v., p. 456. Doctrine of Visual Periods. 250. A string... | |
 | John Tyndall - 1871 - 438 pages
...however intense a luminous beam may be, it remains invisible unless it has something to shine upon. Space, though traversed by the rays from all suns...fills space, and whose motions are the light of the universe, is itself visible. You notice that the end of the experimental tube most distant from the... | |
 | John Tyndall - 1871 - 436 pages
...however intense a luminous beam may be, it remains invisible unless it has something to shine upon. Space, though traversed by the rays from all suns...fills space, and whose motions are the light of the universe, is itself visible. You notice that the end of the experimental tube most distant from the... | |
 | Richard Anthony Proctor - 1872 - 396 pages
...however intense a luminous beam may be, it remains invisible unless it has something to shine upon. Space, though traversed by the rays from all suns and all stars, is itself unseen. Not even the ffither, which fills space, and whose motions are the light of the universe, is itself visible.' And... | |
 | Richard Anthony Proctor - 1872 - 406 pages
...however intense a luminous beam may be, it remains invisible unless it has something to shine upon. Space, though traversed by the rays from all suns and all stars, is itself unseen. Not even the aether, which fills space, and whose motions are the light of the universe, is itself visible.' And... | |
 | John Tyndall - 1873 - 582 pages
...however intense a beam of light may be, it remains invisible unless it has something to shiue upon. Space, though traversed by the rays from all suns...fills space, and whose motions are the light of the universe, is itself visible. (744) You notice that the end of the experimental tube most distant from... | |
 | John Tyndall - 1874 - 216 pages
...speak of rays being either visible or invisible ; it is not the rays themselves but the objects (hey illuminate that become visible. " Space, though traversed...unseen. Not even the ether which fills space, and whoso motions are the light of the world, is itself visible." * * " Proceedings of the Royal Institution,"... | |
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It is worth while to mark how this experiment illustrates the fact that, however intense a luminous beam may be, it remains invisible unless it has something to shine upon. Space, though traversed by the rays from all suns and all stars, is itself unseen.... 
