"You Changed What ALREADY Happened" — Feynman on Wheeler's Delayed Choice скачать в хорошем качестве

"You Changed What ALREADY Happened" — Feynman on Wheeler's Delayed Choice

You fire a photon. It goes through the double slit. Hits the detector. Done. Past. But then you make a measurement. And how the photon behaved in the past... changes. What you do now affected what already happened. Causality ran backward. The future touched the past. This sounds insane. But in quantum physics, it's possible. I'm Richard Feynman. And John Wheeler's delayed choice experiment is the most disturbing thing in quantum mechanics. In this video: → Double slit experiment review (wave or particle — depends on measurement) → Wheeler's delayed choice (you decide AFTER the photon already went through!) → The experiment explained step by step (photon committed, then you changed what it committed to) → Quantum eraser deeper (erase which-path information → interference returns retroactively!) → My conversation with Wheeler about this ("Dick, the photon knows the future" — he didn't believe it either) → Three interpretations compared (retrocausality, delayed wave collapse, many worlds solution) → Why "the photon decided later" makes no sense classically → Delayed choice cosmic version (Wheeler's galaxy thought experiment — billion year old photons!) → What this means for causality (does the arrow of time break in quantum mechanics?) → Why I'm still uncomfortable with this after 50 years → The block universe connection (if future affects past, time is more like space) → "Nobody knows what this means. Anyone who says they do is lying." The honest truth: The math works. The experiments confirm it. The interpretation? Nobody agrees. You can change what the photon did. After it already did it. Not in theory. In actual experiments. Measured. Confirmed. Real. Welcome to quantum mechanics. Where the future reaches backward.