Final answer:
In quantum mechanics, all objects, including ordinary objects, exhibit wave-particle duality, meaning they have both wave-like and particle properties, although wave characteristics in larger objects are usually imperceptible.
Step-by-step explanation:
The question relates to the concept of wave-particle duality in quantum mechanics. According to the theory proposed by Louis de Broglie and confirmed by experiments such as those conducted by Davisson and Germer, all particles exhibit both wave and particle characteristics. This is not limited to subatomic particles; even larger objects like baseballs possess a wave aspect, although the wavelengths are too short to be observed with our current technology. For objects with very small masses like photons, the wave properties are more apparent, and these can be observed more readily. On the other hand, for particles with intermediate masses, such as electrons, the dual nature is significant and utilizable, as evidenced by their use in the electron microscope.
This phenomenon is not limited to electrically charged particles but extends to all matter in motion. Therefore, matter waves, or de Broglie waves, are associated with every physical object and are considered a fundamental aspect of nature in quantum physics. The appearance of wave or particle characteristics depends on the experimental conditions.