Polar Response: A plot of the Amplitude measurement of a speaker's output at a given frequency relative to an off-axis angle. In other words, the difference that exists between how a speaker sounds when being heard directly in front, compared to how it sounds while standing off to one side. (See Dispersion)

 

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Polar Response: A plot of the Amplitude measurement of a speaker's output at a given frequency relative to an off-axis angle. In other words, the difference that exists between how a speaker sounds when bei . . . View Full Definition

Polar-Orbiting Satellite: A satellite whose orbit passes over both of the earth's between poles.

Polarity: The contrasting and complementary qualities shown by signs opposite each other in the zodiac.

Polarity Epoch: An interval of time between reversals of Earth's magnetic field.

Polarity Event: A specific event in the history of Earth's magnetic field. Usually used in reference to a specific polarity reversal.

Polar Molecule: An asymmetric molecule containing polar bonds. H2O, NH3, and hcl are examples of polar molecules. Non-examples are CO2, ccl4, and bcl3 which contain polar bonds but are nonpolar because they . . . View Full Definition

Polar Jet: Marked by a concentration of isotherms and strong vertical shear, this jet is the boundary between the polar air and the subtropical air. It often divides into two branches, the north and th . . . View Full Definition

Polar Bear Grand Tour: Most motorcyclists don't ride in the winter. However, the Polar Bear Grand Tour held each Sunday beginning with the last Sunday in October and ending with the last Sunday in March, allows ri . . . View Full Definition

Polar Bond: A bond involving electrons that are unequally shared. Polar bonds can be thought of as intermediate between the extremes represented by covalent bonds and ionic bonds.

Polar Covalent Bond: A covalent bond in which atoms share electrons in an unequal fashion. The resulting molecule has regions with positive and negative charges. The presence of polar covalent bonds allows other . . . View Full Definition