Direction of the electric vector of anelectromagnetic wave. The wave can be linearly polarized in any directionperpendicular to the direction of travel, circularly polarized (clockwise orcounterclockw
ise), unpolarized, or mixtures of the above.
Direction of the electric vector of an electromagnetic
wave. The wave can be linearly polarized in any
direction perpendicular to the direction of travel,
circularly polarized (clockwise or counterclo
ckwise),
unpolarized, or mixtures of the above.
Relatively fast uniform winds concentrated within the upper atmosphere in a narrow band. The polar jet stream exists in the mid-latitudes at an altitude of approximately 10 kilometers. This jet stream
flows from west to east at speeds between 110 to 185 kilometers per hour. Also see jet stream and subtropical jet stream.
Small, shallow depression which forms mainly in winter over some high-latitude seas within a polar or arctic air mass. Its motion is approximately the same as the air stream in which it is embedded.