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The intensity of an electromagnetic wave is $I = 0.06 \text{ W/m}^2$. What is the maximum value of the magnetic field $B_0$ associated with this wave? (Given $\epsilon_0 = 8.85 \times 10^{-12} \text{ F/m}$ and $c = 3 \times 10^8 \text{ m/s}$)
- A.$2.0 \times 10^{-8} \text{ T}$
- B.$1.5 \times 10^{-8} \text{ T}$
- C.$2.5 \times 10^{-8} \text{ T}$
- D.$3.0 \times 10^{-8} \text{ T}$
Show correct answer & step-by-step solution
Correct answer: A — $2.0 \times 10^{-8} \text{ T}$
Solution
Using and , we calculate . Substituting the values yields .
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