Elementary Treatise On Natural Philosophy volume 4
Elementary Treatise On Natural Philosophy volume 4
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In our eReader you can find the full English version of the book. Read Elementary Treatise On Natural Philosophy volume 4 Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Elementary Treatise On Natural Philosophy volume 4
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1. These lines are constantly referred to as reference marks for the accurate specification of different portions of the spectrum. They always occur in precisely the same places as regards colour, but do not retain exactly the same relative distances one from another, when prisms of different materials are employed, different parts of the spectrum being unequally expanded by different refracting sub- stances. 2 The inequality, however, is not so great as to introduce any difficulty in the ident...ification of the lines.
The dark lines in the solar spectrum are often called Fraunhofer's lines. Fraunhofer himself called them the "fixed lines. " 1050. Invisible Rays of the Spectrum. The brightness of the solar spectrum, however obtained, is by no means equal throughout, but is greatest between the dark lines D and E; that is to say, in the yellow and the neighbouring colours orange and light green; and falls off gradually on both sides.
The heating effect upon a small thermometer or thermopile in- creases in going from the violet to the red, and still continues to increase for a certain distance beyond the visible spectrum at the red end.
What to read after Elementary Treatise On Natural Philosophy volume 4?
You can find similar books in the "Read Also" column, or choose other free books by A Augustin Privat Deschanel to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
1. These lines are constantly referred to as reference marks for the accurate specification of different portions of the spectrum. They always occur in precisely the same places as regards colour, but do not retain exactly the same relative distances one from another, when prisms of different materials are employed, different parts of the spectrum being unequally expanded by different refracting sub- stances. 2 The inequality, however, is not so great as to introduce any difficulty in the ident...ification of the lines.
The dark lines in the solar spectrum are often called Fraunhofer's lines. Fraunhofer himself called them the "fixed lines. " 1050. Invisible Rays of the Spectrum. The brightness of the solar spectrum, however obtained, is by no means equal throughout, but is greatest between the dark lines D and E; that is to say, in the yellow and the neighbouring colours orange and light green; and falls off gradually on both sides.
The heating effect upon a small thermometer or thermopile in- creases in going from the violet to the red, and still continues to increase for a certain distance beyond the visible spectrum at the red end.
What to read after Elementary Treatise On Natural Philosophy volume 4?
You can find similar books in the "Read Also" column, or choose other free books by A Augustin Privat Deschanel to read onlineMoreLess
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