Barry Barish Quotes
The technical challenges were technical challenges that were not unbeatable; it was just that we had to learn how to do things and how to build a sensitive enough device. That took us 20 years after we built the first version of the LIGO detector.
Citations
Barish, Barry. "Interview." NobelPrize.org, Nobel Media AB, 2017.
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Barry Clark Barish is an American experimental physicist and Nobel Laureate. He is a Linde Professor of Physics, emeritus at California Institute of Technology and a leading expert on gravitational waves.