Electricity and Magnetism · Problem 9.18

ELECTRIC FIELDS IN MATTER — Edward Purcell & David Morin

Physics — E&M · em-waves

Problem

If the electric field in free space is E=E0(x^+y^)sin⁡[(2π/λ)(z+ct)]\mathbf{E} = E_0(\hat{\mathbf{x}}+\hat{\mathbf{y}})\sin[(2\pi/\lambda)(z+ct)] with E0=20E_0 = 20 volts/m, then the magnetic field, not including any static magnetic field, must be what?

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