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).
Distance is the scalar measurement of a length or interval between two points and is measured by considering the complete path that it takes to get from one point to another. Displacement is the vector measure of an interval between two locations and describes the shortest path connecting them. The actual or scalar measure is what is described as the scientific definition of distance. For example, consider an example in which a man walks from his house to his car and back.