A single photon flies toward the camera, but the shutter slams shut right in front of it. It can't be cut, so a quantum mixture arises—an endless set of states with different particle numbers. Light on the left, darkness on the right, with a paradoxical transition in between. This play with light promises new instruments.
🎯 With a sufficiently fast shutter, a single photon can multiply: the detector sees two or three, though only one was sent. It's not an illusion, but a direct consequence of light's quantum nature.