What is Relativity? | Sean Carroll on Einstein's View of Time and Space

What is Relativity? | Sean Carroll on Einstein's View of Time and Space

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According to Einstein's special theory of relativity, there is no such thing as a moment in time spread throughout the universe. Instead, time is one of four dimensions in spacetime. Learn how this "relative" view of time is usefully diagramed with light cones, representing the past and future.

From the series: Mysteries of Modern Physics: Time
https://www.thegreatcoursesplus.com/mysteries-of-modern-physics-time

0:00 Understanding Cosmology, Gravity, and Relativity
1:00 Taking a Four-Dimensional Viewpoint of Relativity
2:15 Moving Into a Space-Time View of Reality
3:40 Differences Between a Newtonian and Einsteinian View of the Universe
4:45 The Notion of Simultaneity
5:55 Einstein’s Clocks, Poincaré’s Maps by Peter Galison
6:05 Recurrence Theorem
8:00 Einstein's Clock Patents
8:45 Constructing the Present Moment
10:40 Why Space-Time Is Relative
14:00 What is a Muon?
15:00 Carl Anderson Discovers Muons
15:50 Why Do the Muons Reach Us Before Decaying?
18:30 Einstein's Notion of Time as Personal
20:30 What Are Light Cones?
24:20 Time Dilation and Length Contraction
27:00 How Einstein Conceptualizes Space-Time
28:00 Newtonian Rule for Time Travel
28:45 Implications of Relativity

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#physics #theoryofrelativity #Einstein