Special relativity foundations

What this note covers

1. Inertial frames and the two postulates
2. Events and simultaneity require operational definitions
3. A light clock explains why moving clocks accumulate less time
4. Length contraction and the need for simultaneous endpoints
5. Reciprocity and reunion do not create a logical contradiction
6. Evidence, low-speed limits and avoiding overclaims

6 sections · 10 key terms & formulas · 6 common mistakes