일반물리학 2 — Electromagnetic Waves: Problem 45

45 Sunlight just outside Earth’s atmosphere has an intensity of $1.40\text{ kW/m}^2$. Calculate (a) $E_m$, (b) $B_m$, (c) $E_{rms}$, and (d) $B_{rms}$ for sunlight there, assuming it to be a plane wave.