Use Fig. P.5.3 to show that if a point source is placed at the focus Fv of the ellipsoid,...

Use Fig. P.5.3 to show that if a point source is placed at the focus Fv of the ellipsoid, plane waves will emerge from the far side. Remember that the defining requirement for an ellipse is that the net distance from one focus to the curve and back to the other focus is constant.

Figure P.5.3