AT&T 档案：波动行为的相似之处（加长版）

A Bell Labs film in which Dr. J.N. Shive uses a mechanical wave machine to demonstrate reflection, standing waves, resonance and impedance matching. He includes some equations but relies mostly on real-world examples a layperson can follow.

Why HN likes it: HN repeatedly calls it the clearest introduction to waves and transmission-line behavior, better than modern explainers.

“By far the best introduction to the subject of waves of any sort.”