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Gravitational Waves and Einstein's Interferometer
Feynman really does have a part in the story was that one of the first kind of experimental proposed the tech craft well he did what we call a good oncoming experiment that's a thought experiment yes okay not a real experiment but then after that people believe gravitational waves must exist you can kind of calculate how big they are there's tiny and so people started searching. The first idea that was used was Feynman's idea uh and then the oh very end of it and it was to take a great big huge bar of aluminum and then put around some very very sensitive detectors so that if a gravitational wave happened to go through it here we go and you detect this extra strain that was