Editing Electrical length (section)

== Definition of variables ==
{| class="wikitable"
!Symbol ||Unit ||Definition
|-
|<math>\beta</math>||meter<sup>−1</sup>||[[Wavenumber]] of wave in conductor <math>= 2\pi/\lambda</math>
|-
|<math>\epsilon</math>||[[farad]]s / meter ||[[Permittivity]] per meter of the dielectric in cable
|-
|<math>\epsilon_\text{0}</math>||[[farad]]s / meter ||[[Permittivity of free space]], a fundamental constant
|-
|<math>\epsilon_\text{eff}</math>||[[farad]]s / meter ||Effective relative [[permittivity]] per meter of cable
|-
|<math>\epsilon_\text{r}</math>||none ||[[Relative permittivity]] of the dielectric in cable
|-
|<math>\kappa</math>||none ||[[Velocity factor]] of current in conductor <math>= v_p/c</math>
|-
|<math>\lambda</math>||[[meter (unit)|meter]] ||[[Wavelength]] of radio waves in conductor
|-
|<math>\lambda_\text{0}</math>||[[meter (unit)|meter]] ||[[Wavelength]] of radio waves in free space
|-
|<math>\mu</math>||[[Henry (unit)|henries]] / meter ||Effective [[magnetic permeability]] per meter of cable 
|-
|<math>\mu_\text{0}</math>||[[Henry (unit)|henries]] / meter ||[[Permeability of free space]], a fundamental constant 
|-
|<math>\mu_\text{r}</math>||none ||[[Relative permeability]] of dielectric in cable
|-
|<math>\nu</math>||none ||[[Index of refraction]] of dielectric material 
|-
|<math>\pi</math>||none ||Constant = 3.14159
|-
|<math>\phi</math>||[[radian]]s or [[degree (angle)|degree]]s ||[[Phase shift]] of current between the ends of the conductor
|-
|<math>\omega</math>||[[radian]]s / second ||[[Angular frequency]] of alternating current <math>= 2\pi/f</math>
|-
|<math>c</math>||meters / second ||[[Speed of light]] in vacuum
|-
|<math>C</math>||farads / meter ||Shunt [[capacitance]] per unit length of the conductor
|-
|<math>f</math>||hertz ||[[Frequency]] of radio waves
|-
|<math>F</math>||none ||Fill factor of a transmission line, the fraction of space filled with dielectric
|-
|<math>G</math>||none ||Electrical length of conductor
|-
|<math>G_\text{0}</math>||none ||Electrical length of electromagnetic wave of length l in free space
|-
|<math>l</math>||[[meter (unit)|meter]] ||Length of the conductor
|-
|<math>L</math>||[[henry (unit)|henries]] / meter ||[[Inductance]] per unit length of the conductor
|-
|<math>T</math>||second ||[[Period (physics)|Period]] of radio waves 
|-
|<math>t</math>||second ||time 
|-
|<math>v_p</math>||meters / second ||[[phase velocity]] of current in conductor
|-
|<math>x</math>||meter ||distance along conductor 
|-
|}