Understanding the Differences: Virtual vs Real Photons in Electromagnetic Forces

In summary, virtual photons are theoretical particles that are considered to be the carriers of electromagnetic forces. They differ from real photons in that they cannot be observed or measured, and do not carry energy or interact with matter directly. However, they contribute to electromagnetic forces by mediating interactions between charged particles. Virtual photons cannot be detected due to their lack of physical properties, but understanding their differences from real photons is important in understanding electromagnetism and its practical applications.
  • #1
nomadreid
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Virtual particles confuse me a bit, because although the ones which exist for such short times in Feynman diagrams seem straightforward, the electric and magnetic forces, whose ranges are infinite, are transported via virtual particles, whereas a real photon is just electromagnetic radiation. So, how does one justify that the photons associated with electric and magnetic forces are virtual when these fields are alone but are real when they combine to give light?
 
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  • #2
This question comes up a lot here at PF. I would suggest you to search the quantum forum for virtual particles or virtual photons.
 

FAQ: Understanding the Differences: Virtual vs Real Photons in Electromagnetic Forces

What are virtual photons?

Virtual photons are theoretical particles that are considered to be the carriers of electromagnetic forces. They cannot be directly observed or measured, but their existence is necessary to explain the behavior of electromagnetic forces.

How do virtual photons differ from real photons?

Real photons are particles of light that can be observed and measured. They carry energy and can interact with matter, while virtual photons do not carry energy and do not interact with matter directly.

How do virtual photons contribute to electromagnetic forces?

Virtual photons contribute to electromagnetic forces by mediating the interactions between charged particles. They are exchanged between charged particles, creating an electromagnetic field that influences the behavior of these particles.

Can virtual photons be detected?

No, virtual photons cannot be detected because they do not have measurable physical properties like mass or charge. They only exist as mathematical concepts to explain the behavior of electromagnetic forces.

Why is it important to understand the differences between virtual and real photons?

Understanding the differences between virtual and real photons is crucial in understanding the fundamental principles of electromagnetism. It also helps in developing theories and models that accurately describe and predict the behavior of electromagnetic forces, which has many practical applications in technology and everyday life.

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