The Impossible Measurement | Why We Can't Measure the One-Way Speed of Light

We can experimentally measure the round-trip speed of light, but determining its one-way speed independently of a clock-synchronization convention is impossible. Einstein's convention of equal speed in every direction makes our physics equations consistent and accurate, even though the one-way speed cannot be independently verified using distant synchronized clocks. The video's biggest revelation: Something as fundamental as the speed of light still reveals a surprising limitation in how we measure time and space.