
Figure 1:
Geometrical configuration of the problem.

Figure 2:
Shaded region shows the region of complex growth rate in the nrni − plane.

Figure 3:
Shaded region shows the region of complex growth rate in the nrni − plane.

Figure 4:
Shaded region shows the region of complex growth rate in the nrni − plane.

Figure 5:
Shaded region shows the region of complex growth rate in the nrni − plane.