Barry Barish: Gravitational Waves and the Most Precise Device Ever Built | Lex Fridman Podcast #213

ℹ️ EPISODE INFO

Released

August 23, 2021

Duration

2h 22m

Channel

Lex Fridman Podcast

Watch on YouTube

▶ Open ↗

📝 EPISODE DESCRIPTION

Barry Barish is a theoretical physicist at Caltech and the winner of the Nobel Prize in Physics. Please support this podcast by checking out our sponsors:

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EPISODE LINKS: Barry's Nobel Prize entry: https://www.nobelprize.org/prizes/physics/2017/barish/facts/ Barry's Caltech profile: https://pma.caltech.edu/people/barry-c-barish LIGO's Website: https://www.ligo.caltech.edu/ LIGO's Twitter: https://twitter.com/LIGO PODCAST INFO: Podcast website: https://lexfridman.com/podcast Apple Podcasts: https://apple.co/2lwqZIr Spotify: https://spoti.fi/2nEwCF8 RSS: https://lexfridman.com/feed/podcast/ Full episodes playlist: https://www.youtube.com/playlist?list=PLrAXtmErZgOdP_8GztsuKi9nrraNbKKp4 Clips playlist: https://www.youtube.com/playlist?list=PLrAXtmErZgOeciFP3CBCIEElOJeitOr41 OUTLINE: 0:00 - Introduction 1:08 - Early math and physics questions 10:42 - Enrico Fermi 17:14 - Birth of the Nuclear Age 22:22 - The Fermi Paradox 27:26 - Gravity 44:08 - Philosophical implications of general relativity 51:14 - Detecting gravitational waves 54:28 - LIGO 1:27:25 - Nobel Prize 1:42:14 - Black holes 1:54:34 - Space exploration 2:02:28 - Books 2:11:17 - Advice for young people 2:17:13 - Meaning of life SOCIAL:

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🎤 SPEAKERS

• Lex Fridman

  host

• Barry Barish

  guest

🧾 EPISODE SUMMARY

In this episode of Lex Fridman Podcast, featuring Lex Fridman and Barry Barish, Barry Barish: Gravitational Waves and the Most Precise Device Ever Built | Lex Fridman Podcast #213 explores barry Barish on LIGO, gravity’s whispers, and human curiosity’s risks Barry Barish discusses the decades‑long quest to detect gravitational waves through LIGO, an interferometer capable of measuring distortions thousands of times smaller than a proton. He explains the historical and theoretical path from Newton and Einstein to modern experimental confirmation, detailing the extreme engineering required to isolate such tiny signals from Earth's noise. The conversation broadens into black holes, dark matter/energy, and the hope that gravitational-wave astronomy will reveal early‑universe physics and maybe clues toward unifying quantum mechanics and general relativity. Alongside the science, Barish reflects on curiosity, big-team collaboration, the social risks of scientific progress, Russian literature, and what it means to live a meaningful finite life.

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