The mean intensity of radiation on the surface of the Sun is about 10 8 W / m 2 . The rms value of the corresponding magnetic field is closest to:

Step-by-step solution

I = B 0   2 2 μ 0 × C B 0 = 2 μ 0 I C B r m s = μ 0 I C = 4 π × 10 - 7 × 10 8 3 × 10 8 ≈ 10 - 4   T