Subatomic particles are the smallest known constituents of matter. They include particles such as electrons, quarks, and neutrinos. These particles are considered fundamental, meaning they are not believed to be composed of anything smaller.
In the realm of particle physics, there is a concept called "point particles." According to this concept, subatomic particles are considered to be dimensionless points in space, without any internal structure or size. They are described mathematically as having zero size and being concentrated at a single location.
It's important to note that the concept of "seeing" or visualizing something smaller than a subatomic particle becomes challenging because our everyday notions of visualization rely on interactions with light or other forms of radiation. However, when it comes to particles smaller than subatomic particles, such as quarks or electrons, they are described by mathematical models and are not directly observable in the traditional sense.
The behavior and properties of these particles are studied through experimental observations and theoretical frameworks like quantum mechanics. Scientists use particle accelerators and detectors to study their interactions indirectly, inferring their existence and properties based on the patterns of particle collisions and the effects they produce.
In summary, subatomic particles are currently considered the smallest known constituents of matter. Concepts of size and visual appearance break down at such small scales, and our understanding of these particles is based on mathematical models and experimental observations rather than direct visualization.