Electromagnetic Wave Properties vs Distance · CAP 2008 #Q12
Physics · electromagnetism
Problem
A small source radiates an electromagnetic wave with a single frequency into vacuum, equally in all directions. Indicate the pair of quantities that are decreasing as the wave moves away from the source:
(a) the frequency of the wave and an amplitude of electric field;
(b) the amplitude of the electric field and the intensity of the wave;
(c) the frequency and the intensity of the wave;
(d) the speed of propagation and the wavelength;