The magnetic field of a plane electromagnetic wave is described by the equation
ID: 1497965 • Letter: T
Question
The magnetic field of a plane electromagnetic wave is described by the equation B (x,t) = B_0sin(kx + omegat)(j - k) In what direction is the wave propagating? 45degree with respect to the positive x-axis. -45degree with respect to the positive x-axis. +x -45degree with respect to the positive z-axis. 45degree with respect to the positive z-axis. -x Which of the following expressions correctly describes the electric field associated with this wave? E = c B_0 sin(kx-omegat)(j - k) E = c B_0 sin(kx+omegat)(-j + k) E = c B_0 sin(kx+omegat)(j - k) E = c B_0 sin(kx+omegat)(-j -k) E = c B_0 sin(kx+omegat)(j + k)Explanation / Answer
-x direction
E=B cross K= (j - k) cross (-i) =k + j
last option for both question
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