Transmission of Radiant Energy By Ophthalmic Glasses Being An Essay Contribute
Transmission of Radiant Energy By Ophthalmic Glasses Being An Essay Contribute
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M. Crookes (I. C. ) made six exposures, as reported in his paper, with different times of exposure and found that the spectrum extended to 4520 t. M. After twenty minutes' ex- posure and from that time of exposure on, the limit of spectrum in the ultra-violet increased to 3345 t. M. After one hundred and eighty minutes' exposure. Certain it is that an exposure of three hours does not permit of the presence of much ultra-violet radiation. Also, with- out doubt, abiotic action cannot be traced be...yond about 3100 t. M. Furthermore, the radiation of a body at such temperatures is rela- tively weak all through the ultra-violet (vide Figure 4). The maxi- mum, according to Planck's and "Wein's laws, for a body at 1300 C. Lies far in the infra-red, while the energy in the whole visible and ultra-violet part of the spectrum is less than one per cent, of the total. Hence, to ascribe injurious effects to the visible or ultra-violet radiations without the elimination of the 99 per cent, of infra-red radiation would be, on its face at least, to lose all sense of the pos- sible correlation of cause and effect.
What to read after Transmission of Radiant Energy By Ophthalmic Glasses Being An Essay Contribute?
You can find similar books in the "Read Also" column, or choose other free books by Charles Sheard to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
M. Crookes (I. C. ) made six exposures, as reported in his paper, with different times of exposure and found that the spectrum extended to 4520 t. M. After twenty minutes' ex- posure and from that time of exposure on, the limit of spectrum in the ultra-violet increased to 3345 t. M. After one hundred and eighty minutes' exposure. Certain it is that an exposure of three hours does not permit of the presence of much ultra-violet radiation. Also, with- out doubt, abiotic action cannot be traced be...yond about 3100 t. M. Furthermore, the radiation of a body at such temperatures is rela- tively weak all through the ultra-violet (vide Figure 4). The maxi- mum, according to Planck's and "Wein's laws, for a body at 1300 C. Lies far in the infra-red, while the energy in the whole visible and ultra-violet part of the spectrum is less than one per cent, of the total. Hence, to ascribe injurious effects to the visible or ultra-violet radiations without the elimination of the 99 per cent, of infra-red radiation would be, on its face at least, to lose all sense of the pos- sible correlation of cause and effect.
What to read after Transmission of Radiant Energy By Ophthalmic Glasses Being An Essay Contribute?
You can find similar books in the "Read Also" column, or choose other free books by Charles Sheard to read onlineMoreLess
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