  We explore properties the solution of Langevin equation when stochastic
influence is orthogonal to velocity of a particle. Wiener's process can accept
unlimited values. But for these equations, the attraction surfaces exist. For
these stochastic equations we have constructed the equations for density of
probability in co-ordinates space that are depending an on initial vector of
the particle velocity. Then, using our earlier work and physical sense of
coefficients, we build the equation for diffusion approximating of the original
equation, and find its solution. It is shown that when at the certain
concordance between of coefficients in initial stochastic equation, and
influences aspire to the zero; the position distribution of the particle can be
approximated by the solution of the wave equation with constant speed.
