The electric field in a radio wave traveling through vacuum has amplitude 2.5 × 10−4 V/m and frequency 1.47 MHz.
(a) Find the amplitude and frequency of the magnetic field.
(b) The wave is traveling in the + x -direction. At x = 0 and t = 0, the electric field is 1.5 × 10−4 V/m in the − y -direction. What are the magnitude and direction of the magnetic field at x = 0 and t = 0?