Question

(Induced) Surface charge/current density of dielectric material?

Answer 1

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Consider an incident ss-wave traveling from vacuum to a linear dielectric material (at an angle), clearly there's no surface charge density since E⃗ E→ has no normal component. However, we can get a surface current density from magnetization M

Answer 2

A dielectric (or dielectric material) is an electrical insulator that can be polarized by an applied electric field. When a dielectric is placed in an electric field, electric charges do not flow through the material as they do in an electrical conductor but only slightly shift from their average equilibrium positions causing dielectric polarization. Because of dielectric polarization, positive charges are displaced in the direction of the field and negative charges shift in the opposite direction. This creates an internal electric field that reduces the overall field within the dielectric itself.
Consider an incident ss-wave traveling from vacuum to a linear dielectric material (at an angle), clearly there's no surface charge density since E⃗ E→has no normal component. However, we can get a surface current density from magnetization M⃗ M→.

Isn't this violation of conservation of charge? And how's that possible?

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