Does an electromagnetic shield reflect?

AI Thread Summary
The discussion centers on whether electromagnetic shields, specifically using graphene nanoparticles, can reflect magnetic waves. Participants question the definition of "magnetic wave," suggesting it may refer to electromagnetic waves, akin to how a mirror reflects light. The implications of using an infinite number of shielded nanoparticles are also explored, particularly regarding their potential to reflect signals like radio or gamma waves. Clarity in the questions posed is emphasized, as some contributions lack comprehensibility. Overall, the conversation highlights the complexities of electromagnetic shielding and the nature of wave reflection.
infi
Messages
3
Reaction score
0
Let say a nanoparticle (graphene) is electromagnetic shield. If we send a pulse of magnetic wave will it get reflected back. If it reflects can that be interpreted. And what happens if there going to be infinite EM shielded nanoparticles. Is that any kind signal which will reflects back from shielded particle?
 
Physics news on Phys.org
infi said:
Let say a nanoparticle (graphene) is electromagnetic shield.
What does that mean?
infi said:
If we send a pulse of magnetic wave will it get reflected back.
What is a magnetic wave? Do you mean an electromagnetic wave? In that case: like a mirror?
infi said:
And what happens if there going to be infinite EM shielded nanoparticles.
What exactly is infinite here?
 
Well if particle is shielded with EM shield and if we going to send radio or gamma wave does it going to reflect back
 
Well if particle is shielded with EM shield and if we going to send radio or gamma wave does it going to reflect back. Infinite (lot of nanoparticle dispersed in water)
mfb said:
What does that mean?What is a magnetic wave? Do you mean an electromagnetic wave? In that case: like a mirror?
What exactly is infinite here?
 
infi said:
gonna

That's not a word. It's not even slang. It's just baby talk.

Nothing you have written is comprehensible. I suggest you think about it from the perspective of your reader and see if you make your question clear in her mind.
 
This is from Griffiths' Electrodynamics, 3rd edition, page 352. I am trying to calculate the divergence of the Maxwell stress tensor. The tensor is given as ##T_{ij} =\epsilon_0 (E_iE_j-\frac 1 2 \delta_{ij} E^2)+\frac 1 {\mu_0}(B_iB_j-\frac 1 2 \delta_{ij} B^2)##. To make things easier, I just want to focus on the part with the electrical field, i.e. I want to find the divergence of ##E_{ij}=E_iE_j-\frac 1 2 \delta_{ij}E^2##. In matrix form, this tensor should look like this...
Thread 'Applying the Gauss (1835) formula for force between 2 parallel DC currents'
Please can anyone either:- (1) point me to a derivation of the perpendicular force (Fy) between two very long parallel wires carrying steady currents utilising the formula of Gauss for the force F along the line r between 2 charges? Or alternatively (2) point out where I have gone wrong in my method? I am having problems with calculating the direction and magnitude of the force as expected from modern (Biot-Savart-Maxwell-Lorentz) formula. Here is my method and results so far:- This...
Back
Top