## Course of theoretical physics: Electrodynemics of continuous media |

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Page 246

We may also write out again equation (70.4), which gives the discontinuity of v, in

terms of that of H,: V12 _ V11 = H" (H12 _ H11 Equations (72.2)—(72.5) form a

complete system of equations of

the ...

We may also write out again equation (70.4), which gives the discontinuity of v, in

terms of that of H,: V12 _ V11 = H" (H12 _ H11 Equations (72.2)—(72.5) form a

complete system of equations of

**shock waves**. We shall conventionally assignthe ...

Page 251

From the inequalities (73.4) and (73.5), with (73.7), we see that the tangential

fields on the two sides of the

slow

From the inequalities (73.4) and (73.5), with (73.7), we see that the tangential

fields on the two sides of the

**shock wave**are not only collinear but parallel. Inslow

**shock waves**we have, on both sides of the discontinuity, v, < H,'/41rj = vf/v,.Page 390

Multiplication of these two equations gives for the

—E,)/(D2—D,). (111.7) In a

the rate of dissipation per unit area of the discontinuity surface. To calculate Q,

we ...

Multiplication of these two equations gives for the

**shock wave**velocity v2 =c2(E2—E,)/(D2—D,). (111.7) In a

**shock wave**there is dissipation of energy. Let Q bethe rate of dissipation per unit area of the discontinuity surface. To calculate Q,

we ...

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angle anisotropy anisotropy energy antiferromagnetic atoms axes axis body boundary conditions calculation charge circuit coefﬁcient coefficients components conductor constant coordinates corresponding cross-section crystal Curie point curl H deﬁned deﬁnition denote dependence derivatives determined dielectric diffraction direction discontinuity dissipation domains electric ﬁeld electromagnetic ﬁeld electrons ellipsoid energy ﬂux expression external ﬁeld external magnetic ﬁeld ferroelectric ferromagnet ﬁeld H ﬁnd ﬁnite ﬁrst ﬁrst term ﬂow ﬂuctuations ﬂuid formula free energy frequency function given gives grad Hence incident induction inﬁnite integral isotropic Landau theory layer linear magnetic ﬁeld magnetohydrodynamics magnetostriction magnitude medium normal obtain optical particle permittivity perpendicular perturbation phase plane polarization PROBLEM propagated properties pyroelectric quantities reﬂection refraction relation respect result rotation satisﬁed scattering shock wave signiﬁcance solution sphere superconducting surface symmetry tangential temperature tensor theory thermodynamic potential transition uniaxial upper half-plane values variable velocity volume wave vector z-axis zero