. Contributions. n finding n from the formula n = M + d-2 - di, the ds can be found with an error affecting n by =t .02 of a fringe. Theresulting error in dfx/dt is 10 X 10-*. The difference in temperaturecould be determined with an error of ± .002. The error in d/d/dt fromthis source is 4 X lO^. The length of L could be found to ± .001 mm.,resulting in an error in dfi/dt of i X lO^. The total error in the final result due to these errors is E = 10-V102 + 42 + i2 = X I0-^or I unit in the seventh decimal place. Scheel has found the length of a fused quartz ring similar to the oneused here
. Contributions. n finding n from the formula n = M + d-2 - di, the ds can be found with an error affecting n by =t .02 of a fringe. Theresulting error in dfx/dt is 10 X 10-*. The difference in temperaturecould be determined with an error of ± .002. The error in d/d/dt fromthis source is 4 X lO^. The length of L could be found to ± .001 mm.,resulting in an error in dfi/dt of i X lO^. The total error in the final result due to these errors is E = 10-V102 + 42 + i2 = X I0-^or I unit in the seventh decimal place. Scheel has found the length of a fused quartz ring similar to the oneused here to be well represented by the expression It = /o(i + X 10-^/ + X iO-«/2). The mean value of a computed from the above formula for each temper-ature range was used; and mi, as found by the prism method, using a Zeissspectrometer, is i .3342. ^i need not be known with the greatest accuracyas an error of .001 is negligible as affecting the factor a/^. Vol. 3. IXDEX OF REFRACTIO^f OF WATER. 206. ?^ 1^ 8S^contributions02michuoft
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