Spectroscopy
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In our eReader you can find the full English version of the book. Read Spectroscopy 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 Spectroscopy
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It will be found during the rotation of the echelon that there is one position at which the direction of motion of the lines in the field is reversed ; the echelon is then normal to the incident light, which is the best position for work.
The chief objection to this grating lies in the small value of the separation of consecutive "orders of spectra. The objection- able nature of this makes itself felt, when lines are examined which have a considerable breadth of their own. For example, b the ca...se of the grating given above, the angular separation of consecutive orders is about 2' of arc, or 0*0005893 radian, while the dispersion is 104615 at D, i.e. dd^ = o"oooio46 radian when dX^ - o'l A.U. The greatest possible breadth, therefore, of a line in the neighbourhood of D which can be observed without two orders overlapping is about 0-56 A.U.
200 SPECTROSCOPY The Echelette Grating. — One of the most important problems connected with the grating is the question of the distribution of intensity amongst the spectra of the different orders.
What to read after Spectroscopy?
You can find similar books in the "Read Also" column, or choose other free books by Baly, E. C. C. (Edward Charles Cyril), B. 1871 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
It will be found during the rotation of the echelon that there is one position at which the direction of motion of the lines in the field is reversed ; the echelon is then normal to the incident light, which is the best position for work.
The chief objection to this grating lies in the small value of the separation of consecutive "orders of spectra. The objection- able nature of this makes itself felt, when lines are examined which have a considerable breadth of their own. For example, b the ca...se of the grating given above, the angular separation of consecutive orders is about 2' of arc, or 0*0005893 radian, while the dispersion is 104615 at D, i.e. dd^ = o"oooio46 radian when dX^ - o'l A.U. The greatest possible breadth, therefore, of a line in the neighbourhood of D which can be observed without two orders overlapping is about 0-56 A.U.
200 SPECTROSCOPY The Echelette Grating. — One of the most important problems connected with the grating is the question of the distribution of intensity amongst the spectra of the different orders.
What to read after Spectroscopy?
You can find similar books in the "Read Also" column, or choose other free books by Baly, E. C. C. (Edward Charles Cyril), B. 1871 to read onlineMoreLess
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