Fundamentals of Engineering Electromagnetics 1st Edition by David Cheng

Exercise 7

There is a continuing discussion on radiation hazards to human health. The following calculations provide a rough comparison.
a) The U.S. standard for personal safety in a microwave environment is that the power density be less than 10(mW/cm 2 ). Calculate the corresponding standard in terms of electric field intensity. In terms of magnetic field intensity.
b) It is estimated that the earth receives radiant energy from the sun at a rate of about 1.3 (kW/m 2 ) on a sunny day. Assuming a monochromatic plane wave (which it is not), calculate the equivalent amplitudes of the electric and magnetic field intensity vectors.