The nature of light and electrons can be understood through the concept of wave-particle duality. According to this concept, both light and electrons can exhibit characteristics of both particles and waves, depending on how they are observed or measured.
In some experiments, light behaves as a wave. For example, it can exhibit interference and diffraction patterns, similar to how waves propagate and interact with each other. In other experiments, light behaves as a particle, known as a photon. Photons carry discrete amounts of energy and can interact with matter in a particle-like manner.
Similarly, electrons also exhibit wave-particle duality. In certain experiments, electrons behave as particles, such as when they interact with a detector and produce localized impacts. In other experiments, electrons display wave-like behavior, such as when they pass through a double-slit experiment and produce an interference pattern.
So, to answer your question, both light and electrons can exhibit characteristics of particles and waves. It depends on the experimental setup and how they are observed or measured.