Question

Using boundary conditions on the electric and magnetic fields, derive the Fresnel reflection and transmission coefficients for a plane wave incident normally on a boundary between two dielectric media.

19 Jan 2026
Answer :
Word Count : 481
Consider a uniform plane electromagnetic wave incident normally on a planar boundary separating two homogeneous, isotropic, non-conducting dielectric media. Let medium 1 (z < 0) be characterized by permittivity ε₁, permeability μ₁, refractive index n₁, and intrinsic impedance η₁ = √(μ₁/ε₁). Medium 2 (z > 0) is characterized similarly by ε₂, μ₂, n₂, and η₂. The incident wave propagates along the +z direction with its electric field polarized along the x-axis and magnetic field along the y-axis. The electric field ________ _____ ________ _________ ____ __________ ______ ____ ____ ___ ____.
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