GAP 

 B = I.41L K'=I.I45 k'.-I.O K'=0.8 

 ^ DIRECTION OF 



K =0.6 



INCIDENT WAVE 



K:0.4 



Johnson , 1952 ) 



Figure 2-45. Contours of equal diffraction coefficient gap 

 vd.dth = 1.41 wavelengths (B/L = 1.41). 



Diffracted Wove h'eiaht 



Figure 2-46. 



Contours of equal diffraction coefficient gap 

 width = 1.64 wavelengths (B/L = 1.64). 



2-95 



