## 4.2 Special Relativity

Relative Motion of Observers

Propagation of Light

The Mystery of the Luminiferous Aether

Einstein's Postulates

Derive: Lorentz Transformations

Length Contraction & Time Dilation

Relativistic Laser Tag

Cosmic Ray Muons

Spacetime Intervals and Causality

Chimp Twin Paradox

Rotations in Spacetime

Plight of the ABC Jungle Fruit

Superluminal Observations

UFO Encounter

Four-Velocity

Energy-Momentum Conservation

High-Energy Particles

Photons

### Course description

This course was written in collaboration with Aaron Miller, a PhD in physics from Penn State University, and was integrated into a YouTube video series on MinutePhysics. Beginning with famous thought experiments and a few intuitive principles from Newtonian mechanics, this course closely follows Einstein's arguments leading to the epiphany that time and space are a single entity, spacetime, where physical processes unfold. After gaining experience with the mathematical machinery of relativistic physics, you will open the door to high-energy phenomena and Einstein's famous relationship, E = mc². In the end this course will boost you to the cusp of the most elegant of physical theories: general relativity.

### Topics covered

- 4-vectors
- Lorentz Transformations
- Mass-energy Equivalence
- Spacetime Paradoxes
- Particle Physics
- Reference Frames
- Spacetime Curvature
- Spacetime Diagrams
- Spacetime Intervals
- Time Dilation

### Prerequisites and next steps

You’ll need a fundamental understanding of Newtonian mechanics.