Probability Amplitude

In quantum mechanics, we don’t talk about certainty—we talk about probabilities. But unlike flipping a coin, quantum systems are described by probability amplitudes, which are complex numbers.

The Born Rule tells us how to convert these amplitudes into actual chances. Specifically, if a particle has a wavefunction ψ(x), then the probability of finding it at position x is given by |ψ(x)|².

This rule connects the math of quantum theory with real-world experiments. It also explains why interference happens—because amplitudes add before squaring, allowing for surprising patterns where some outcomes cancel out!