520 



TABLE 538.— REFRACTIVE INDEX OF SILVER CHLORIDE (AgCl) AT 23.9°C * 



Tenths of microns 



Wave- 

 length 

 U 



0. 



1. 



2. 

 3. 



Wave- 

 length 



1 



1.5 



2 



2.5 



3 



3.5 



4 



4.5 



5 



5.5 



2.02239 2.01865 

 2.00615 2.00559 

 2.00230 2.00203 



2.02239 

 2.01047 

 2.00615 

 2.00386 

 2.00230 

 2.00102 

 1.99983 

 1.99866 

 1.99745 

 1.99618 



2.01582 2.01363 2.01189 

 2.00510 2.00465 2.00424 

 2.00177 2.00151 2.00126 



Wave- 

 length 



6 



6.5 



7 



7.5 



8 



8.5 



9 



9.5 

 10 

 10.5 



1.99483 

 1.99339 

 1.99185 

 1.99021 

 1.98847 

 1.98661 

 1.98464 

 1.98255 

 1.98034 

 1.97801 



2.09648 2.06385 2.04590 2.03485 2.02752 



2.01047 2.00931 2.00833 2.00750 2.00678 



2.00386 2.00351 2.00318 2.00287 2.00258 



2.00102 2.00078 2.00054 2.00030 2.00007 



Prepared by Leroy W. Tilton, Earle K. Plyler, and Robert E. Stephens, National Bureau of Standards. 



TABLE 539.— INDEX OF REFRACTION OF FLUORITE (CaF 2 ) IN AIR 



Part 1 



Part 2 163 



Change of index of refraction of fluorite for 1°C in units of the 5th decimal place 



C line, —1.220; D, —1.206; F, —1.170; G, —1.142. 



183 Schonrock, Zeitschr. Instrumentenkunde, vol. 40, p. 94, 1920; vol. 41, p. 104, 1921. 



SMITHSONIAN PHYSICAL TABLES 



