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JEE PHYSICS MCQ: ELECTROMAGNETIC WAVES

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The intensity of electromagnetic wave is equal to (symbols have their usual meanings)

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Correct option: A

\varepsilon_0 E_{{rms}} B_{{rms}} C^2

Option B (

\varepsilon_0 E^2

rms) is incorrect. The correct formula is

I = c \epsilon_0 E_{rms}^2 = c \frac{B_{rms}^2}{ \mu_0} = c \epsilon_0 E_{rms}B_{rms}

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