Adding and doubling solution to the 1D Fokker-Planck Equation

The 1D Fokker-Planck equation (FPE) plays a major role in the propagation of light universe. It specifically describes small angle scattering photons (and electrons) as they travel participating media. In particular, differential term representing phase function law enables scattering. This also makes FPE challenge to solve discrete ordinate sense. Our approach utilizes adding and doubling, which has been successfully applied since 1960s linear Boltzmann equation. With help Morel’s equivalence angular Laplacian, becomes similar ordinates transport theory. We then take advantage similarity through doubling for its solution.