An interest thought experiment

In summary, the conversation discusses a detector that can detect electromagnetic waves and whether it will flash when A holds it and runs at a constant velocity relative to a charged particle. It is suggested that the detector would detect a magnetic field and an induced current, but the problem lies in its poor description and what it actually detects. A clear definition of the detector is needed.
  • #1
qinglong.1397
108
1
Suppose we have a detector which can detect the electromagnetic wave. If there exists the electromagnetic wave, the detector will flash.

Now, A holds this detector and runs at a constant velocity relative to a charged particle. Will the detector flash? I think it will. In Chapter 11.10 of Classical Electrodynamics by Jackson, we already calculate the electric and magnetic fields in A's frame. The fields are not static. So I think the detector should flash. But the problem is that the fields do not have the wave form. There is no phase term in the mathematical expressions. So, what is the problem?
 
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  • #2
qinglong.1397 said:
Suppose we have a detector which can detect the electromagnetic wave. If there exists the electromagnetic wave, the detector will flash.

Now, A holds this detector and runs at a constant velocity relative to a charged particle. Will the detector flash? I think it will. In Chapter 11.10 of Classical Electrodynamics by Jackson, we already calculate the electric and magnetic fields in A's frame. The fields are not static. So I think the detector should flash. But the problem is that the fields do not have the wave form. There is no phase term in the mathematical expressions. So, what is the problem?
A would detect a magnetic field since he will view the (relatively) moving charge as an electric current. This would simply be an application of Ampere's law. He would also be able to detect an induced current if he was carrying a conducting loop connected to a galvanometer. Why do you think he would detect an electromagnetic wave from A?

AM
 
  • #3
That is because the electric and magnetic fields are both changing all the time. This is neither a static electric problem nor a static magnetic problem.
 
  • #4
qinglong.1397 said:
So, what is the problem?
The problem is simply a poor description of the detector. What does it detect? If just any time varying fields then yes, it triggers. If it only detects fields with "the wave form" then it will not trigger.
 
  • #5
DaleSpam said:
The problem is simply a poor description of the detector. What does it detect? If just any time varying fields then yes, it triggers. If it only detects fields with "the wave form" then it will not trigger.

Oh, yeah. Thanks for your reply. I think I should give a clear definition of the detector. Sorry about that.
 

FAQ: An interest thought experiment

What is an interest thought experiment?

An interest thought experiment is a mental exercise that explores a scientific or philosophical concept without the need for physical experimentation. It allows scientists to delve into theoretical or hypothetical scenarios to better understand a concept or theory.

How is an interest thought experiment different from a regular experiment?

An interest thought experiment is different from a regular experiment in that it is purely conceptual and does not involve any physical testing or data collection. It is a tool used to explore ideas and theories, rather than to prove or disprove them.

What are the benefits of using an interest thought experiment?

An interest thought experiment allows scientists to think outside of the constraints of traditional experimentation. It can lead to new insights and perspectives on a subject, and can also help scientists to better understand complex or abstract concepts.

Can an interest thought experiment be used to make scientific discoveries?

While an interest thought experiment cannot directly lead to scientific discoveries, it can inspire new ideas and hypotheses that can then be tested through physical experimentation. It is an important tool for the development of new theories and concepts.

How can I create my own interest thought experiment?

To create your own interest thought experiment, start by choosing a scientific or philosophical concept that interests you. Then, imagine a hypothetical scenario that explores this concept and consider the possible outcomes. Finally, analyze and reflect on the results to gain a deeper understanding of the concept. Remember, there are no right or wrong answers in an interest thought experiment, so let your imagination run wild!

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