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Thus, Maxwell's equations (-(have to be added with boundary conditions (1, (1, (2 and (These conditions mean a continuity of tangential components of a vector (2 and a normal component of a vector (1 upon transition through limit of the section of two environments. The normal component of a vector upon transition through limit of the section tests jump, a tangential component of a vector if there are superficial currents (

As in practice it is almost always necessary to solve Maxwell's equations (– (in piecewise and continuous environments, boundary conditions (2 it is necessary to consider as an integral part of the equations of Maxwell (– (.