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Solving a problem in physics, section 25, paragraph 52

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52. In the medium (ε = 3, μ = 1) extends a plane electromagnetic wave. The amplitude of the magnetic field of the wave of 0.5 A / m. On her way to the propagation direction is perpendicular to the absorbing surface having the shape of a circle of radius 0.1 m. What is the energy absorption of the surface for the time t = 30 s? The period of the T-wave << t.
Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)
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