Space Time And Gravitation An Outline of the General Relativity Theory
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In our eReader you can find the full English version of the book. Read Space Time And Gravitation An Outline of the General Relativity Theory 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 Space Time And Gravitation An Outline of the General Relativity Theory
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A further advantage was provided by the check-plates at Principe, which gave an independent determination of the * See Frontispiece. The two telescopes are shown and the backs of the two coelostat-mirrors which reflect the sky into them. The clock driving the larger mirror is seen on the pedestal on the left.
118 WEIGHING LIGHT [CH.
difference of scale of the telescope as used in England and at the eclipse; for the Sobral plates this scale-difference was eliminated by the method of reduction, w...ith the consequence that the results depended on the measurement of a much smaller relative displacement.
There remained a set of seven plates taken at Sobral with the 4-inch lens ; their measurement had been delayed by the necessity of modifying a micrometer to hold them, since they were of unusual size. From the first no one entertained any doubt that the final decision must rest with them, since the images were almost ideal, and they were on a larger scale than the other photographs. The use of this instrument must have presented considerable difficulties the unwieldy length of the telescope, the slower speed of the lens necessitating longer exposures and more accurate driving of the clock-work, the larger scale rendering the focus more sensitive to disturbances but the observers achieved success, and the perfection of the negatives surpassed anything that could have been hoped for.
What to read after Space Time And Gravitation An Outline of the General Relativity Theory?
You can find similar books in the "Read Also" column, or choose other free books by Arthur Stanley Eddington to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
A further advantage was provided by the check-plates at Principe, which gave an independent determination of the * See Frontispiece. The two telescopes are shown and the backs of the two coelostat-mirrors which reflect the sky into them. The clock driving the larger mirror is seen on the pedestal on the left.
118 WEIGHING LIGHT [CH.
difference of scale of the telescope as used in England and at the eclipse; for the Sobral plates this scale-difference was eliminated by the method of reduction, w...ith the consequence that the results depended on the measurement of a much smaller relative displacement.
There remained a set of seven plates taken at Sobral with the 4-inch lens ; their measurement had been delayed by the necessity of modifying a micrometer to hold them, since they were of unusual size. From the first no one entertained any doubt that the final decision must rest with them, since the images were almost ideal, and they were on a larger scale than the other photographs. The use of this instrument must have presented considerable difficulties the unwieldy length of the telescope, the slower speed of the lens necessitating longer exposures and more accurate driving of the clock-work, the larger scale rendering the focus more sensitive to disturbances but the observers achieved success, and the perfection of the negatives surpassed anything that could have been hoped for.
What to read after Space Time And Gravitation An Outline of the General Relativity Theory?
You can find similar books in the "Read Also" column, or choose other free books by Arthur Stanley Eddington to read onlineMoreLess
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