HORTON: THE EFFECT OF ROUGH INTERFACES ON SIGNALS 

 THAT PENETRATE THE BOTTOM 



0- 



1 o 

 e = e 



sm 



(^2-^l)- 



cos 6 (z„-z, 

 e I 2 1 



(10) 



BEHAVES PROPERLY AT P 



BUT IF WE THINK OF P AS A SOURCE AND Q AS THE DETECTOR, 



z„ and z , MUST BE INTERCHANGED. 

 THE HELMHOLTZ FORMULATION. 



THIS IS IMPORTANT IN 



Figure 9. CONVENTION REGARDING SOURCE AND FIELD POINTS 

 TO REMEDY ASYMMETRY IN GREEN'S FUNCTION 



288 



