gabbagabbahey said:We can't see your attachment until it is approved by admin. It would be quicker if you uploaded your pdf to imageshack.us and then posted a link to it.
yungman said:It can be opened now.
Thanks
gabbagabbahey said:Not by me it can't. It still says that it is pending approval.
Defennder said:I don't think your expression for the real part of [tex]\mathbf{E}(R,\theta,t)[/tex] and [tex]\mathbf{H}(R,\theta,t)[/tex] are correct. Remember that the original phasor expression for E and H has 'j' inside, meaning that you have to multiply throughout by j, so that makes the formerly imaginary part real and the formerly real part imaginary.
The Poynting vector is a mathematical concept used in electromagnetism to describe the directional flow of energy in an electromagnetic field. It is represented by the symbol S and is a vector quantity, meaning it has both magnitude and direction.
The Poynting vector is calculated using the formula S = E x H, where E is the electric field and H is the magnetic field. This formula takes into account both the electric and magnetic components of an electromagnetic wave to determine the direction and magnitude of energy flow.
The Poynting vector represents the flow of energy in an electromagnetic field. It shows the direction and rate at which energy is being transferred from one point to another. It is an important concept in understanding the behavior of electromagnetic waves.
The magnitude of the Poynting vector is directly proportional to the intensity of an electromagnetic wave. This means that as the Poynting vector increases, the intensity of the electromagnetic wave also increases. This relationship allows scientists to measure the intensity of electromagnetic radiation using the Poynting vector.
The Poynting vector has many practical applications, including in the fields of telecommunications, solar energy, and medical imaging. It is used to understand and optimize the transmission of electromagnetic waves in various technologies, such as cell phones and radio antennas. It is also used in solar panels to determine the efficiency of energy conversion. In medical imaging, the Poynting vector is used to measure the amount of energy absorbed by different tissues in the body during an MRI scan.