Introduction to material waves
Material wave, also known as De Broglie wave, that is, the function is a probability wave, and its modularity refers to the probability density that may occur at a certain point in space at a certain time. The probability density is governed by the fluctuation law. Quantum mechanics believes that a microscopic particle has no definite position. When it is not measured, it appears at any position at the same time, both here and there. Once measured, one of its eigenvalues is the observed position. There is also a distribution for other observable measurements. One of the eigenvalues is obtained during the observation. The material wave appears at the macroscopic scale as the expected value of the probability wave function, and the uncertainty failure is negligible.