How to Calculate Phase Constant

By Gabriel Dockery; Updated April 24, 2017

A phase constant represents the change in phase per unit length for a standing plane wave. The phase constant of a standing plane wave is denoted with the greek letter β (beta) and demonstrated the relationship between waveform cycles and wavelength. This quantity is often treated equally with a plane wave's wave number. However, this must be used with caution because the medium of travel changes this equality. Calculating the phase constant from frequency is a relatively simple mathematical operation.

Create an empty fraction.

Place 2π in the numerator.

Place the wavelength, often denoted as the Greek letter λ (Lambda), in the denominator.

Perform the indicated division and simplify as necessary. This final value is the phase constant of the plane wave being investigated.

About the Author

Gabriel Dockery began writing in 2009, with his work published on various websites. He is working toward a Bachelor of Science in neuroscience in a transfer program between Ivy Tech College and Indiana State University.