o 



CO 



z 

 < 



I- 



o 

 oc 



a. 



6,400 



RED 



WAVELENGTH (ANGSTROMS) 

 SEAWATER, K = 0.04 AT 5,000 A 



Fig. 10.4 Light transmission as a function of wavelength through 20 feet of clear sea- 

 water. The constant k is the coefficient of absorption for seawater. [From Ref. (4)] 



474 



