The vector in any one plane, say XY as depicted in Figure 6-11 a, can be resolved into two mutually perpendicular components AB and CD as shown in Figure 6-12b. If the two components for all of the planes shown in Figure 6-12a are combined, the resultant has the appearance shown in Figure 6-12c. Removal of one of the two resultant planes of vibration in Figure 6-12c produces a beam that is plane polarized. The resultant electric vector of a plane-polarized beam then occupies a single plane in space. Figure 6-llc shows an end-on view of a beam of plane-polarized radiation after various time intervals.