Upon conquering Special Relativity, Albert Einstein spent almost a decade trying to integrate it into the framework of gravity. His breakthrough was to realize that "A falling man doesn't feel his own weight." This set him off to reconfigure gravity not as a force, but rather as the pure geometry of space and time.
This is the eighth of the videos in my new series of Cosmology. I'm going through Dr. Barbara Ryden's textbook "Introduction to Cosmology". If you follow along, you'll get a full upper-division undergraduate course in Cosmology. I used this textbook at William Paterson University.
This course will cover the current state of the science of Cosmology. To follow along, it'll be a good idea for you to ge to know your calculus. Here are the topics of this video:
Introductory Cosmology
Chapter 03: Newton versus Einstein
Section 03: The General Way of Einstein
Some things covered:
Defining The Equivalence Principle
Extrinsic Versus Intrinsic Curvature
The Weak Equivalence Principle
The Einstein Equivalence Principle
Local Lorentz Invariance
Local Positional Invariance
The Einstein Equivalence Principle
Metric Theories of Gravity
The Strong Equivalence Principle
Thought Experiments for the Einstein Equivalence Principle
Gravitational Redshift
The Pound-Rebka Experiment
Tests of the various form of the Equivalence Principle
Curved Spacetime and Geodesics
Textbook: / introduction-to-cosmology
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