ADDENDUM 



189 



2. Quantum requnenienl in green measured light. 



Incident intensities determined by means of the bolometer, 

 tion 94% so that 



Degree of absorp- 



\/\p = 0.94 it/xo, 



compensation 

 light + green 



limiting value (Fig. 71 continuous line) 



2.85 





v^ 





V ,^_ 



