EMPIRICAX, PLANT SPECTRA 



695 



60 



50 



aJ 40 



< 



I- 



u 30 

 o 

 a: 

 iij 



°- 20 



600 1000 1400 1800 



WAVE LENGTH, m/i 



2200 



2600 



Fig. 22.30. Transmission and reflection of near infrared by a rubber leaf 

 (ficm elastica) (after Loomis, Carr and Randall 1941). This thick (0.8 mm.) 

 leaf has normal reflection, but shows rather general absorption in the transmission 

 spectrum. 



Fig. 22.31. Leaves photographed in infrared light on white background (after 



Loomis, Carr and Randall 1941). 



