Hour Physics

Surely the exact opposite of Minute Physics is the Richard Feynman’s hours-long (and entirely engaging) talks given for the Messenger Lectures at Cornell. Here’s the first hour:

The whole series isn’t available from a single source, but it all seems to be available (following YouTube’s “related videos”, or just searching for “The Character of Physical Law”).

Possibly my favorite thing anybody’s ever said comes in the seventh part, Seeking New Laws:

Now I’m going to discuss how we would look for a new law. In general, we look for a new law by the following process:

First, we guess it. Then we compute the consequences of the guess to see what (if this law that we guessed is right) it would imply. Then we compare the computation results to nature — or we say compare to experiment or experience.

If it disagrees with experiment, it’s wrong.

In that simple statement is the key to science. It doesn’t make a difference how beautiful your guess is, how smart you are, who made the guess, or what his name is. If it disagrees with experiment, it’s wrong. That’s all there is to it.

He goes on to talk about how once we had confidence in the law of gravitation we were able to derive new laws (and calculate for the first time the speed of light), and in that way describes how each new discovery in science leads to exponentially more new discoveries in turn. Another gem: “We’re trying to prove ourselves wrong as quickly as possible because only in that way do we find progress.”