The tag has no wiki summary.

learn more… | top users | synonyms

1
vote
0answers
18 views

Using the Poynting Vector in Coaxial Cables for Power

Why is it that we can use the Poynting Vector to find the power dissipated in a Coaxial Cable? Unlike the situation with light, where the c makes sense, inside the coaxial cable I see no reason why ...
1
vote
0answers
46 views

Where Is the mechanical energy flow in Poynting's theorem?

Poynting's theorem is usually interpreted as the statement of the conservation of energy, where the change in mechanical and electromagnetic energy within the volume equals the flow of electromagnetic ...
0
votes
0answers
71 views

Absorbance by using Poynting vector

How should I compute the amount of energy of an EM wave absorbed in the material? Can I just use the divergence times the Poynting vector?
0
votes
0answers
213 views

electromagnetics : intrinsic impedance and poynting vector

I know that 1/2 of the real part of the complex poynting vector gives the average power flow per unit area. But what is the significance of its imaginary part ? What is the significance of the ...
0
votes
0answers
102 views

Intensity of unpolarized light

If the electromagnetic field of an unpolarized plane wave is written as $$\bar{E}(t,\bar{x})=(\bar{E}_{0x}+\bar{E}_{0y}e^{i\delta(t)})e^{i(\bar{k}\bar{x}-\omega t)}$$ ...