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Energy and momentum transport velocities on transmission systems

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1 Author(s)
Johnson, Curtis C. ; University of Washington, Seattle, Wash.

It has been noted in the literature that the power-energy relation for electromagnetic fields may be written in the form of a flow continuity equation, and thereby a velocity of electromagnetic energy flow may be defined. The force-momentum field relation may be used in the same way to define a velocity of momentum flow, and it is shown that the flow velocity for both momentum and energy is the group velocity.

Published in:

Proceedings of the IEEE  (Volume:56 ,  Issue: 7 )

Date of Publication:

July 1968

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