Direction of Poynting vector

Thread starter arash1r
Start date Oct 7, 2012
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Direction Poynting vector Vector

In summary, the direction of Poynting vector is the direction of energy flow in an electromagnetic wave, determined by the cross product of the electric and magnetic field vectors. It is crucial in understanding the propagation of electromagnetic waves and plays a role in determining the intensity and interaction of the wave with materials. The direction can be calculated using equations and the right-hand rule, and can change depending on the properties of the medium and the direction of the electric and magnetic fields.

Oct 7, 2012

arash1r

I have a question: when the poynting vector and energy propagation in electromagnetic waves are in the same direction and when are in different direction?

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Oct 7, 2012

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The Poynting vector is the direction of energy flow, I don't see how it could point in the opposite direction. Maybe metamaterials have some strange properties here.

Related to Direction of Poynting vector

What is the Direction of Poynting Vector?

The direction of Poynting vector is the direction of energy flow in an electromagnetic wave. It is defined as the cross product of the electric field and magnetic field vectors, and is perpendicular to both of these vectors.

How is the Direction of Poynting Vector related to Electromagnetic Waves?

The direction of Poynting vector is crucial in understanding the propagation of electromagnetic waves. It indicates the direction in which energy is being transported by the wave, and is always perpendicular to the direction of wave propagation.

What is the Significance of the Direction of Poynting Vector?

The direction of Poynting vector is significant in determining the intensity of an electromagnetic wave. It also plays a role in the absorption and scattering of electromagnetic radiation by materials.

How is the Direction of Poynting Vector Calculated?

The direction of Poynting vector is calculated using the equations for electric and magnetic fields in an electromagnetic wave. It can also be visualized using the right-hand rule, where the direction of the vector is determined by curling the fingers of the right hand in the direction of the electric field and then pointing the thumb in the direction of the magnetic field.

Can the Direction of Poynting Vector Change?

Yes, the direction of Poynting vector can change depending on the properties of the medium through which the electromagnetic wave is propagating. It can also vary with the direction of the electric and magnetic fields.