A sinusoidal electromagnetic wave from a radio station passesperpendicularly thr
ID: 1308967 • Letter: A
Question
A sinusoidal electromagnetic wave from a radio station passesperpendicularly through an open window that has area of 0.501 m^2. The wave travels to the right in the positive x direction at the speed of light c and the window is thus perpendicular to x-axis. assume the field magnitude Em = 0.01000 V/m. the rms (root mean square) of the electric field would thus Erms = Em/sqareroot(2) = 0.00707 V/m
a)in what direction does the magnetic field point?
b) compute the numerical value of amplitude Bm of the magnetic field component posting in the direction you found in part (a)
c) write the wave function for the magnetic field component you referenced in part a and b in term of Bm, k, w,t,x, and other symbols
d)how much energy does this wave carry through the window during 30 seconds tv commercial?do you need the value of the magnetude field to answer this question? explain?
From a Tv startles trans a please electron suggestive wave is as really as that has area The wave travels to the right is the positive a directions of speed of light a and the windows is thus per to L-axis. below. Suppose the three electric have wave functions see the below. At the shown the electric field - indicated by the vertically is the positive directions Assume the field The of the electric field would these beExplanation / Answer
a) Magnetic field points in the Z-direction.
b) Equating energy densities of magnetic and electric fields.
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