State Vector Collapse

State vector collapse refers to the process in quantum mechanics where a particle’s multiple possible states become limited to a single definite state upon measurement. Think of a quantum system as being in a blend of many potential outcomes simultaneously. When observed, this blend "collapses" into just one outcome—like a coin that was in a state of spinning and, upon catching, shows either heads or tails. This collapse is not fully understood physically but is essential to how quantum systems appear to behave during measurement, bridging the gap between quantum potentialities and definite classical results.