22 



V. P. GORBATOVA 



and if v^ 



.<Vm-^ 



'w, p ^ •^m—1, p' 



(P ,p \ — — (P , P ,\ , Qmf^m, p — Qm-lVm-l,p 



9m'^m, p ''r Qm—l'^m-1, p 

 Cose b. From the curve corresponding to the same parameters y and A 

 as on the reflecting boundary (see Fig. 6) at a point with a reading along the 



/I- 0-4 



C^ 



QJ 



0-9 



08 



0-7 



SinCref 

 0-2 0- 



0-6 



06 



Fig. 5. Curves for calculating the coefficient of reflection of longitudinal waves 



from the layer boundary with a higher velocity of propagation than in the layer in 



which the incident ray is travelling. 



abscissa equal to the sine of the angle of reflection, we take the ordinate 

 (^m;Pm)rel ifVp>V + l, P' ^r (^,n' ^m')rel' if V p > V-1, p'/^^ "^"1^1- 

 ply it by the coefficient of reflection of planar waves when the incidence i^ 

 vertical. The product gives the coefficient of reflection, that is if 



'■ m. p -^ m + 1, p 



