If the Intensity of an Electromagnetic Wave Is 80 MW/m²

question 5

Multiple Choice

If the intensity of an electromagnetic wave is 80 MW/m², what is the amplitude of the magnetic field of this wave? (c = 3.0 x 10⁸ m/s, μ₀ = 4π × 10^-7 T ∙ m/A, ε₀ = 8.85 × 10^-12 C²/N ∙ m²)

• A) 0.82 mT
• B) 0.33 µT
• C) 10 T
• D) 14 T
• E) 0.58 mT

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