费曼：为什么

A short clip of Richard Feynman answering an interviewer's question about why magnets repel, explaining that a 'why' question depends on a shared framework of understanding. It illustrates how hard it is to explain fundamentals to a layperson.

Why HN likes it: Cited constantly as the classic answer to 'why' questions, on explanation, frames of reference and the limits of physics.

“I like to refer people to Feynman's answer to a question about why magnets repel each other[0].”