This book offers an elementary and intuitive account of diffraction by a wide slit in an infinite conducting plane, focusing on electromagnetic waves with a single electric-field component. It also shows how these ideas apply to acoustic problems.

The author builds a practical framework by combining a two-half-plane view with a simple, well-tested field representation. The result is an asymptotic approach that improves on earlier methods, especially for large slit widths. The text connects familiar half-plane diffraction results to the slit case, and demonstrates how interaction between the edges alters the transmitted field. Numerical results complement the theory, comparing the new approximation with exact solutions to highlight its range and accuracy.
What you’ll experience

A step-by-step introduction to modeling diffraction from a slit as a sum of edge-based contributions.
A clear path from the classic half-plane problem to the slit problem, including how line-source effects enter.
Practical formulas and approximations that work best when slit width is large compared with the wavelength.
Numerical comparisons that show how the new interaction term improves predictions over the traditional non-interaction term.

Ideal for readers who want a concrete, worked-through view of wave diffraction, with both theory and numerical insight.

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