**Physics Notes - Herong's Tutorial Notes** - v3.24, by Herong Yang

Introduction of Spacetime

This chapter provides an introduction of spacetime. Topics include definition of spacetime; world line of an object in a spacetime frame; light cone of an event in a spacetime frame.

Takeaways:

- Spacetime is a mathematical model that uses a frame of reference including both space and time with a 4-dimension coordinate system.
- A world line is the path of an object left in a spacetime frame of reference.
- A light cone is a 4-dimensional surface in a spacetime frame where all events on the surface can be connected to a central event by light.

Table of Contents

Introduction of Frame of Reference

Introduction of Special Relativity

Time Dilation in Special Relativity

Length Contraction in Special Relativity

The Relativity of Simultaneity

Minkowski Spacetime and Diagrams

Introduction of Generalized Coordinates