Was Einstein "wrong"? | Testing new theories of gravity

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We're not done with gravity yet - General Relativity hasn't had the final say. Go to http://brilliant.org/DrBecky and sign up for free. The first 200 people that go to that link will get 20% off the annual premium subscription. 00:00 - Video Introduction 01:00 - A brief history of gravity 01:59 - Einstein's theory of General Relativity 06:21 - Problems in Cosmology and why we care 08:46 - How do we come up with new theories of gravity? 09:23 - Starting with an observation e.g. MOND 12:20 - Adding an extra field/force 14:12 - Adding extra dimensions e.g. string theory 16:25 - Conclusions 19:09 - Bloopers Thanks to Dr Oliver Tattersal, an expert on modified gravity theories for helping me with the content of this video: https://www2.physics.ox.ac.uk/contacts/people/tattersall Here are the review papers that he sent my way to get me started for those who want a deep dive (note: written for the academic community - you may prefer to read Pedro Ferreira's book 'The Perfect Theory' which is written for a public audience: https://www.amazon.co.uk/dp/B00CTMAAN4/ref=dp-kindle-redirect?_encoding=UTF8&btkr=1) Ferreira (2019) - https://arxiv.org/pdf/1902.10503.pdf Berti et al. (2015) - https://arxiv.org/pdf/1501.07274.pdf Clifton et al. (2012) - https://arxiv.org/pdf/1106.2476.pdf And BONUS - a fairly recent review on String Theory from Mukhi (2011) - https://arxiv.org/pdf/1110.2569.pdf -- The artwork in the background is a scientifically accurate map showing the orbits of more tha

Published 2020-06-11 · Watch on YouTube ↗
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