@quantumnotebook8: Put two metal mirrors a tiny distance apart in a pitch-black vacuum. Even if both mirrors are electrically neutral, it takes a little work to pull them apart. Where does that attraction come from? ⚛️🤔 Even in the dark, the electromagnetic field is still there. Its strength has tiny quantum fluctuations. The mirrors change which wave patterns that field can form in the gap, a bit like the length of a flute determines which notes it can play. 🎓 Here’s how that becomes a force. With the mirrors closer together, the mirrors and the field have slightly less energy overall. To move them apart, you have to supply that difference. The tiny attraction you’re working against is the Casimir effect. In the video, the gold strip is flexible enough for that pull to show up as a bend. #CasimirEffect #QuantumPhysics #QuantumMechanics #QuantumFluctuations #QuantumVacuum