(Solution) - An electromagnetic wave falls normally on the boundary between t -(2025 Original AI-Free Solution)

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An electromagnetic wave falls normally on the boundary between two isotropic dielectrics with refractive indices n1 and n2. Making use of the continuity condition for the tangential components, E and H across the boundary, demonstrate that at the interface the electric field vector E
(a) Of the transmitted wave experiences no phase jump;
(b) Of the reflected wave is subjected to the phase jump equal to ? if it is reflected from a medium of higher optical density.