English to Spanish Science Physics

At grazing incidence the incident and reflected fields merge, so that onehalf the total field propagating along the face of the edge
toward the edge is the incident field and the other half is the reflected field.

To simplify the discussion, the wedge angle has been restricted so that 1 < n < 2; however, the solution for the diffracted field may be applied to an interior wedge where 0 < n < 1.