Length

Length is a measure of distance. In the International System of Quantities, length is a quantity with dimension distance. In most systems of measurement a base unit for length is chosen, from which all other units are derived. In the International System of Units (SI) system, the base unit for length is the metre.

energy transferred to an object via the application of force on it through a displacement

[[File:Circle-withsegments.svg|thumb|right|Circle with

thumb|right|The wavelength of a sine wave, λ, can be measured between any two points with the same phase, such as between crests (on top), or troughs (on bottom), or corresponding [[zero crossings as shown.]]

thumb|250px|Perimeter is the distance around a two-dimensional [[shape, the length of the shape's boundary.]]

vector that is the shortest distance from the initial to the final position of a point P

measure of how strongly an optical system converges or diverges light

thumb|The distance A to B is the wingspan of this Boeing 777-200ER

the contraction of length in the direction of propagation in special relativity

conventional distance in mathematics and physics

property of a curve

physical quantity in a molecular structure

counterintuitive observation that the coastline of a landmass does not have a well-defined length

product of a distance and a physical quantity

range of lengths from the subatomic to the astronomical scales

in quantum mechanics, the wavelength of a photon whose energy is the same as the rest energy of a particle

measure of a charge carrier's net electrostatic effect in a solution and how far it persists

maximum length of a vessel's hull measured parallel to the waterline

photography term

theorem that every curve of constant width has perimeter π times its width

distance between RGB dots (sub-pixels) on a display

dimension that defines the scale of a physical system

perimeter of a cross sectional area that is wet

extent or size of a length, distance, or area being studied or described

Operational range in various contexts