In wave-particle duality, which of the following is an example of a phenomenon that exhibits both characteristics?

Wave-particle duality is a fundamental concept in quantum mechanics that describes how every particle or quantum entity may be partly described as a particle and partly as a wave. Electrons serve as a prominent example of this duality.

When electrons are observed in certain experiments, such as the double-slit experiment, they display wave-like behavior by creating interference patterns. This indicates that they can propagate as waves. Conversely, electrons also exhibit particle-like properties when measured, demonstrating that they have a discrete nature and can be detected at specific locations.

This duality is central to understanding the behavior of subatomic particles and is a key principle in quantum mechanics, reinforcing the idea that entities at the quantum level do not conform strictly to classical definitions of waves or particles.

Other options like sound waves are exclusively wave phenomena, and gravity as well as magnetic fields do not exhibit this dual nature in the same manner as particles do. Thus, electrons are the quintessential example of wave-particle duality in action.