Zero dimensional point particles?

In summary, all elementary particles, such as electrons and quarks, are considered to be zero dimensional and have no size. This is because if they had a size, they would also have internal structure, which goes against our current models. Additionally, if they had a non-zero diameter, it would affect our understanding of physics as it would take a non-zero amount of time for a signal to pass through them.
  • #1
ajv
15
0
All elementary particles, which are not made up by any other particles (electrons, quarks), are said to be zero dimensional and have no size. But why not? Are electrons literally zero dimensional particles with no size?
 
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  • #2
ajv said:
All elementary particles, which are not made up by any other particles (electrons, quarks), are said to be zero dimensional and have no size. But why not? Are electrons literally zero dimensional particles with no size?
Can't point particles have size that is just too small to see?
 
  • #3
If they have size then they must have internal structure. Our current models say they don't.
If they are of non-zero diameter, then it takes a non-zero duration for a signal to pass from one side to the other, and that would mess up our current understanding physics.
 

1. What is a zero dimensional point particle?

A zero dimensional point particle is a theoretical concept in physics that represents a particle with no physical size or extent. It is often used in simplified models to study the behavior of particles at a specific location, without considering their size or shape.

2. Do zero dimensional point particles exist in the real world?

No, zero dimensional point particles are purely theoretical and do not exist in the real world. They are used as a mathematical tool to simplify complex physical systems and make calculations easier.

3. How are zero dimensional point particles different from regular particles?

Zero dimensional point particles are different from regular particles because they have no physical size or extent. Regular particles have a measurable size and shape, while zero dimensional point particles are considered to be infinitesimally small and have no shape.

4. How are zero dimensional point particles used in scientific research?

Zero dimensional point particles are used in scientific research as a simplified model to study the behavior of particles at a specific location. They are also used in theoretical physics to understand the fundamental properties of matter and energy.

5. Can zero dimensional point particles be observed or measured?

No, zero dimensional point particles cannot be observed or measured because they have no physical size or extent. They are a theoretical concept used to simplify complex physical systems, and their existence cannot be directly observed or measured.

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