This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1911 Excerpt: ...Sci. (4), 26, 370-371, October, 1908. of the one was parallel with the greatest ellipsoidal axis (t of the second, as indicated in Figs. 44, 45. At the point a of this wedge both plate and wedge have the same thickness and the dark band of exact compensation is observed. The interference color rises slowly on either ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1911 Excerpt: ...Sci. (4), 26, 370-371, October, 1908. of the one was parallel with the greatest ellipsoidal axis (t of the second, as indicated in Figs. 44, 45. At the point a of this wedge both plate and wedge have the same thickness and the dark band of exact compensation is observed. The interference color rises slowly on either side of this band, as in the ordinary combination wedge; this part of the wedge especially is an exceedingly sensitive device for detecting anisotropy in very weakly birefracting substances. By combining this wedge with a Bravais-Biot compensator with isochromatically illuminated field it is possible to measure the pathdifference of the emergent waves with great accuracy. Shortly after the appearance of the above paper and without knowledge of the same, J. Koenigsberger described a modification of the Bravais double plate showing the sensitive-tint, in which very thin mica plates were substituted for the thicker Bravais plates, and a low gray interference color was thus obtained. This combination is useful for the detection of weak anistropy. Following the example of Bravais, Koenigsberger has combined his plate with a Biot-Bravais compensator and is able, with the combination, to determine the path-difference with great accuracy.f With the sensitivetint double plate Bravais was able to measure differences of slightly less than 1 Mm. while Koenigsberger claims an accuracy of 0.0003 or about 0.2 Mm for the thinner double plate. The double combination wedge of the writer has the advantage of these plates because of its adjustable sensibility, by virtue of which the interference tint can be changed and the particular color selected which is the most sensitive under the given conditions of observation; although in the double combination wedge the fi...
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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Seller's Description:
PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
