A polarizer or polariser is an optical filter that lets light of a specific polarization pass and blocks waves of other polarizations. It can convert a beam of light of undefined or mixed polarization into a beam of well-defined polarization, that is polarized light. The common types of polarizers are linear polarizers and circular polarizers.
Length is a measure of one dimension, whereas area is a measure of two dimensions (length squared) and volume is a measure of three dimensions (length cubed).In most systems of measurement, the unit of length is a base unit, from which other units are defined.ength is a measure of one dimension, whereas area is a measure of two dimensions (length squared) and volume is a measure of three dimensions (length cubed).
Full Definition of LENGTH. 1. a: the longer or longest dimension of an object c: the quality or state of being long. 2. a: duration or extent in time b: relative duration or stress of a sound.xamples of LENGTH. 1  The length of the table is six feet, and its width is three feet. 2  These pins are available in one-and two-inch lengths. 3  The adult animals reach a maximum length of two meters. 4  Your essay should be no more than 250 words in length. 5  the length of a movie. 6  They were two car lengths behind us.