How Waves Really Behave | Reflection, Refraction, Diffraction & Interference Explained

Why do waves sometimes bounce, bend, spread, or even cancel each other? In this episode of EM Basics, we'll explore the four fundamental wave behaviors that form the foundation of electromagnetics, optics, wireless communication, and many modern technologies: ✅ Reflection ✅ Refraction ✅ Diffraction ✅ Interference You'll also discover why light really does diffract, even though it usually appears to travel in straight lines. Many people believe light never bends around obstacles. The truth is more interesting: visible light does diffract, but its wavelength is so small (about 400–700 nm) that the effect is usually too subtle to notice in everyday life. That's why diffraction becomes obvious in experiments using narrow slits or optical gratings, but not when light passes through a typical doorway. Whether you're an engineering student, an RF engineer, or simply curious about how waves behave, this episode builds the intuition you'll use throughout electromagnetics and wireless engineering. 📡 EM Basics is a series designed to explain complex engineering concepts using simple visuals, real-world examples, and accurate physics. Chapters 00:00 Introduction 00:31 Reflection 05:32 Refraction 11:58 Diffraction 18:33 Interference 26:47 Summary