20: Parametric Resonance Last updated Dec 30, 2020 Save as PDF 19.9: A Note on the Physics of These Waves 20.1: Introduction to Parametric Resonance Page ID29539 Michael FowlerUniversity of Virginia ( \newcommand{\kernel}{\mathrm{null}\,}\) 20.1: Introduction to Parametric Resonance20.2: Resonance near Double the Natural Frequency20.3: Example- Pendulum Driven at near Double the Natural Frequency