14. Introduction to the Four-Vector

Fundamentals of Physics (PHYS 200)

The four-vector is introduced that unifies space-time coordinates x, y, z and t into a single entity whose components get mixed up under Lorentz transformations. The length of this four-vector, called the space-time interval, is shown to be invariant (the same for all observers). Likewise energy and momentum are unified into the energy-momentum four-vector.

00:00 - Chapter 1. Recap—Consequences of the Lorentz Transformations
06:25 - Chapter 2. Causality Paradoxes: "Killing the Grandmother"
15:22 - Chapter 3. A New Understanding of Space-Time
25:51 - Chapter 4. Introducing the Fourth Dimension and Four-Vector Algebra
44:09 - Chapter 5. The Space-Time Interval, or "Proper Time"
51:47 - Chapter 6. Deriving the Velocity and Momentum Vectors in Space-Time
01:04:40 - Chapter 7. The New Energy-Mass Relation

Complete course materials are available at the Open Yale Courses website: http://open.yale.edu/courses

This course was recorded in Fall 2006.

Category:

Education

Tags:

• Einstein
• Euclidean
• space
• Fermilab
• Law
• Conservation
• Energy
• Newtonian
• physics
• relativity