Tốc Độ Ánh Sáng - Tại Sao Nó Đặc Biệt? | Thuyết Tương Đối Tập 1

You turn on the headlights of a moving car. The light shoots forward. Logically, a person on the roadside should see that light faster—the speed of light plus the speed of the car. But no. That person measures exactly 299,792,458 m/s. No more. No less. The addition of velocities—which works perfectly for all objects—suddenly breaks when applied to light. And to explain why, a 26-year-old patent examiner in Bern had to rewrite how we understand time and space. #TheoryOfRelativity #SpeedOfLight #Einstein