after Ry= wn reflections Z wCRadey ia pu + he TE ~ VG? we| Ve-V, 3) Po | R3 4) | = = ws - Vv ' Ne af ter Omer) O Ride, Oo = tos” “Ny q) n . reflections : —ky [va™ pu (2) Vo-Y after w vef lectioxs . Ht) tL Re = (ner) Cede, to) pu mh [ “¥e"| * Vo-V, Case Iv. For DY | & xplosiow he® : Go = - ces. in the Y, air. after "ve n Raats ( ' R, =( naa Ride, 9) pu = Wa- MK ret fections Vv: Va 2 ‘ ) 2 14) \ \ | 2) Vv, A, 60 >= cos” ( apex Ri* (n+ Z)(Radey 10) pu 3) 6.> cos" | qi . | v, “te —~ hark after 2 Va-; (vy; - Vg?) ¢ apex hp) Raz = (m+ F)( Rie, 1) put ha) reflections + LLNLSS) after nw reflections ho — he 4 Wz, ( Vet- Va") * a ee ae aeae !