426 



WRIGHT— POLARIZED LIGHT IN THE 



resented graphically in Fig. 4 in which the refractive indices are 

 plotted along the abscissae, the reflecting power in per cent, along 

 the ordinates ; the absorption indices are indicated by the curves. 

 In Fig. 5 the same relations are expressed in different form ; 



O K— » 1 



Fig. 5. In this figure the reflecting power (curves) in per cent, for nor- 

 mally incident light, of a plate of refractive index n (ordinates) and of 

 absorption index k (abscissae) is indicated. The optical constants of a num- 

 ber of element's are also given. 



the ordinates are the refractive indices, the abscissae, the absorption 

 indices and the curves, the reflecting power in per cent. In this 

 figure are also included the refractive and absorption indices of cer- 

 tain opaque elements and compounds. The figure is instructive 



