This question has been debated by scientists for centuries, and it seems that there is no definitive answer. The first to study this phenomenon were pioneers in the field of quantum mechanics, such as Max Planck who said “Light can both be regarded as a wave or a stream of particles.” To answer this question, not only must you understand quantum mechanics but also the concept of energy. Energy can be defined as a system’s capacity to do work or produce heat; its magnitude is determined by how much potential it has in doing so.
This means that there are transitions of higher and lower energies depending on the type of particle (wave) or waveform (particle). What does this mean? Essentially, there are no “transitions” between any two types of particles because they have differing properties–and thus different values for their respective energies. However, there may be transitions from one state to another within each type: e.g., an electron transitioning from ground state to excited state where it emits photons with greater frequency.