The Double-Slit Experiment is one of those concepts that completely rewires how you think about reality. The setup is simple: particles, like electrons or photons, are sent toward a barrier with two slits. But here’s where it gets wild—if you don’t observe them, they act like waves, creating an interference pattern as if they passed through both slits. The moment you observe them, though, they behave like particles and only go through one slit. It’s not just weird—it’s unsettling. The idea that

2.2M views · 34K reactions | Jim Al-Khalili explains the experiment...