Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFPoynting vector:
It states that the cross product of electric field vector (E) and magnetic field vector (H) at any point is a measure of the rate of flow of electromagnetic energy per unit area at that point that is
Where P = Poynting vector, E = Electric field and H = Magnetic field
The Poynting vector describes the magnitude and direction of the flow of energy in electromagnetic waves.
The unit of the Poynting vector is Watt/m2
Analysis:
For the given distribution, the direction of electric field = +y direction, and
The direction of magnetic field = +x direction.
Now, the direction of propagation must be such that it satisfies the Poynting theorem, i.e. the direction of propagation will be:
âp = âY × âX
âp = - âZ
∴ The wave is propagating in the negative z-direction.
Last updated on Jun 17, 2025
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