: Astronomy: Stokes vector

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Stokes vector

The Stokes parameters are a set of values that describe the polarization state of electromagnetic radiation. The Stokes parameters are often combined into a vector, known as the Stokes vector. The Stokes vector spans the space of unpolarized, partially polarized, and fully polarized light. For comparison, the Jones vector only spans the space of fully polarized light, but is more useful for problems involving coherent light. The four Stokes parameters are not a preferred coordinate system of the space, but rather were chosen because they can be easily measured or calculated. (Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Stokes_parameters#Stokes_vectors)

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