16.3 Exercise 14

At the top of Earth’s atmosphere, the time-averaged Poynting vector associated with sunlight has a magnitude of about $1.4 \text{kW}/\text{m}^{2} .$
(a) What are the maximum values of the electric and magnetic fields for a wave of this intensity? (b) What is the total power radiated by the sun? Assume that the Earth is $1.5 \times 10^{11} \text{m}$ from the Sun and that sunlight is composed of electromagnetic plane waves.