“I gave as a problem, as a Gedanken problem, the idea, ‘Well, let’s measure gravitational waves by sending light beams between things,’ because that was something you could solve. The idea was that here was an object. You’d put another object here and make a right triangle of objects, floating freely in a vacuum. And we’d send light beams between them and then be able to figure out, ‘What does the gravitational wave do to the time it takes light to go between those things?’ It was a very stylized problem, like a haiku, you know? You’d never think that it was of any value.”
