BM.78L 



K=I.195 KM.O 

 DIRECTION OF 



K = 0.8 



K:0.6 



( Johnson , I 952 



INCIDENT W;*VP 



Figure 2-47. Contours of equal diffraction coefficient gap 

 width = 1.78 wavelengths (B/L = 1.78). 



Diffrocted Wove Height 



16 18 20 



( Johnson, 1952) 



Figure 2-48. Contours of equal diffraction coefficient gap 

 vd.dth = 2 wavelengths (B/L = 2). 



2-96 



