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Which mechanism causes phase shift during microwave transmission through layered dielectrics?

A)Fresnel reflection at interfaces
B)Dielectric breakdown propagation velocity
C)Constructive interference amplification feedback
D)Resonant cavity electron spin precession

💡 Explanation

Fresnel reflection occurs because of impedance mismatches at dielectric interfaces, causing reflections and a phase shift depending on the wavelength and layer thickness; therefore the electromagnetic wave's phase shifts, rather than causing breakdown or spin effects.

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