Part 3/8:
When two particles become entangled, their interconnectedness becomes apparent once one of the particles is measured. For instance, if one particle is measured and found to possess a specific property (e.g., spin), the other particle—no matter how far away—will instantaneously assume the complementary property. While this phenomenon has been repeatedly verified in laboratory settings and is foundational in technologies such as quantum cryptography and quantum teleportation, it does not enable the transfer of information between the particles. Instead, it demonstrates a correlation that requires a classical channel for meaningful communication.