Question

Constants Part A The energy flow to the earth from sunlight is about 1.40 kW/m2 Find the maximum value of the electric field for a sinusoidal wave of this intensity N/C Submit Part B Find the maxiiurm value of the magnei field or a sinusoidal wave of this inltensily. Submit RequestAnswer Part C The distance from the earth to the sun is about 1.50x101. Find the total power radiated by the sun Submit Request Answer <Return to Assignment Provide Feedback

Answer 1

a) E_max = sqrt [2 I / e₀ c]

= sqrt [2 * 1.4 * 10³ / (3 * 10⁸ * 8.85 * 10^-12)]

maximum electric field = 1.026 * 10³ N/C

b) B_max = E_max / c

= (1.026 * 10³) / (3 * 10⁸)

maximum magnetic field = 3.42 * 10^-6 T

c) P = I A = I * 4 pi r²

= 1.4 * 10³ * 4 pi * (1.5 * 10¹¹)²

= 3.96 * 10²⁶ W