Question

what is the meaning of the product of psistar and psi?

Answer 1

what is the meaning of the product of psistar and psi?

A wave function or wavefunction (most common symbols used are $\psi$ or $\Psi$) is a probability amplitude in quantum mechanics describing the quantum state of a particle and how it behaves. Typically, its values are complex numbers and, for a single particle, it is a function of space and time. Although $\psi$ is a complex number

$$\psi \psi^* = |\psi|^2$$

(where $\psi^*$ - the complex conjugate of the $\psi$)

is real, and corresponds to the probability density of finding a particle in a given place at a given time, if the particle's position is measured.