The Magnetic Field of an Electromagnetic Wave Has a Peak

question 9

Multiple Choice

The magnetic field of an electromagnetic wave has a peak value of 5.0 × 10^-10 T.What is the intensity of the wave? (c = 3.0 × 10⁸ m/s,c = 3.00 × 10⁸ m/s,μ₀ = 4π × 10^-7 T ∙ m/A, ε₀ = 8.85 × 10^-12 C²/N ∙ m²)

• A)1.0 × 10^-13 W/m²
• B)1.5 × 10^-5 W/m²
• C)3.0 × 10^-5 W/m²
• D)2.0 × 10^-13 W/m²
• E)7.5 × 10⁵ W/m²