The wave-particle duality of quantum particles, such as electrons, is indeed a fundamental aspect of quantum mechanics. It means that particles, in certain experiments or situations, can exhibit both wave-like and particle-like properties. However, it's important to clarify some misconceptions regarding the behavior of electrons and the notion of "unfolding" and "enfolding" into waves.
In quantum mechanics, particles like electrons are described by wave functions, which are mathematical entities that encode the probability amplitudes for different outcomes of measurements. These wave functions exhibit wave-like behavior in the sense that they can undergo interference and exhibit characteristic wave patterns. However, it's crucial to note that wave functions themselves are not physical waves in the classical sense. They are mathematical representations used to describe the probabilistic behavior of quantum particles.
When an experiment is conducted to measure the position of an electron, for example, the wave function "collapses" to a localized particle-like state, and we observe the electron as a particle at a specific position. Conversely, when experiments are conducted to observe interference or diffraction patterns, the wave-like behavior of the electron becomes more prominent.
It is not accurate to say that electrons "unfold" into particles and then "enfold" back into waves at a particular frequency. The behavior of electrons is described by the superposition principle, which means that the wave function encompasses all possible states simultaneously, including both wave-like and particle-like aspects. The observation or measurement of a particle collapses the wave function into a specific state.
The frequency associated with the wave-like behavior of a particle is not a fixed property of the particle itself. Instead, it depends on the experimental setup and the conditions under which the particle is observed. The frequency of a wave is determined by its wavelength and the speed at which it propagates. In the case of electrons, their wave-like behavior is related to their de Broglie wavelength, which is inversely proportional to their momentum.
To summarize, while electrons exhibit wave-particle duality, it is not accurate to describe their behavior as "unfolding" into particles and "enfolding" back into waves at a particular frequency. The wave-particle duality is a fundamental aspect of quantum mechanics that is described by the mathematical formalism of wave functions.