Final answer:
The particle aspect of sunlight is known as a photon, which is a fundamental quantum of light energy exhibiting wave-particle duality.
Step-by-step explanation:
Sunlight exhibits a dual nature, which means it displays both wave-like and particle-like properties. This phenomenon is known as wave-particle duality. When we refer to the particle aspect of sunlight, we are talking about photons, which are essentially packets of energy. These photons can exhibit behavior that is characteristic of both particles and waves, depending on the conditions of the experiment observed.
In the context of the Photoelectric Effect, which was explained by Albert Einstein, the energy quanta of light are recognized as photons. This discovery was key to developing quantum mechanics and illustrates the particle nature of light. Additionally, in Compton scattering, which is a phenomenon where X-rays are scattered by electrons, further demonstrated the particulate nature of light by showing interactions between photons and electrons.
Therefore, the particle associated with sunlight mentioned in the question is known as a photon, which is distinct from electrons, protons, and neutrons. Electrons are, in fact, a type of lepton, not a photon or other forms of radiation such as neutrinos.