How Do Charged Particles Interact Without Physical Contact?

AI Thread Summary
Charged particles can interact without physical contact through the electromagnetic force. This force is mediated by virtual photons, which facilitate the interaction between charges. The phenomenon allows one charge to exert a force on another even when they are not in direct contact. For a deeper understanding of this interaction, consulting an expert in the field is recommended. The principles of electromagnetic force are fundamental to understanding particle interactions in physics.
gaurav pant
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A charge kept in the vicinity of another charge experiences a force without any physical contact how so
 
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Simple answer: Electromagnetic force.

Simple form of complex answer: The electromagnetic force, which is mediated by virtual photons.

If you want a more in-depth answer I'm sure an expert on the subject could expand on the simple answer.
 

Thread 'Derivation of Hamilton's Principle: Questions'

I have recently been really interested in the derivation of Hamiltons Principle. On my research I found that with the term ##m \cdot \frac{d}{dt} (\frac{dr}{dt} \cdot \delta r) = 0## (1) one may derivate ##\delta \int (T - V) dt = 0## (2). The derivation itself I understood quiet good, but what I don't understand is where the equation (1) came from, because in my research it was just given and not derived from anywhere. Does anybody know where (1) comes from or why from it the...
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