EUGENE RAIUNOWITCH AND i.OVlNDJEE 



379 



0.08 



2 



0.06 



E 



3 



"c 

 O 



o 



0.04 



C.02 



680 700 720 740 



Wave Length 



Fig. I. Decline of quantum yield, 0, in the far red in Chlorella. Dashed curve, 

 incomplete absorption; solid curve, approach to complete absorption (showing that 

 red drop is not simply the consequence of incomplete absorption). (After Emerson 

 and Lewis, 13). 



o 



— 



>■ 



z 



t- 

 X 

 < 

 3 

 O 



I V- 



cf 



0.0 6- 

 - ..7 



• ■> 



0^4 



. e/ . 

 0.00 



J- 



4O0 



460 



500 550 600 



WAVE LENGTH , m^ 



650' 



70 



Fig. 2. Decline of quantum yield, 0, in the red in Porphyridium. Solid curve, 

 cells adapted to green light; dotted curve, cells adapted to blue light. (.After 

 M. Brody and R. Emerson, 1.) 



