The wave-particle duality concept is not limited to electrons or subatomic particles. It applies to all entities that exhibit both particle-like and wave-like behavior, including photons (particles of light), atoms, and even large molecules. In theory, this duality can extend to very small living things such as viruses, although the practical challenges of conducting a double-slit experiment with such complex objects make it currently unfeasible.
The double-slit experiment has been successfully performed with various particles, including electrons and photons, and has demonstrated their wave-particle duality. When these particles are sent through a double-slit apparatus one at a time, they exhibit an interference pattern on the screen, indicating wave-like behavior. However, when their paths are observed or measured, they behave more like discrete particles, resulting in a loss of the interference pattern.
Extending the experiment to larger, more complex objects like viruses introduces significant technical difficulties. Viruses are much more massive and have more intricate structures compared to particles like electrons. Additionally, maintaining the coherence of their quantum properties over large distances and shielding them from environmental interactions becomes increasingly challenging.
While it remains an open area of research, conducting a double-slit experiment with viruses or similar biological entities is currently beyond the capabilities of experimental techniques. The wave-particle duality principle applies in theory, but practical limitations make it difficult to observe and measure the quantum behavior of larger, more complex objects.