Question

Pretest: Electromagnetic waves Name Pretests 159 1. Shown below are pictorial and mathematical representations of an electromagnetic plane wave space. The electric field is parailel to the z-axis. The magnetic field propagating through empty is parallel to the y-axis. The E(x, y, z, t) E, sin(kx + 0x)2 The points P. Q. R, and S in the diagram above lie in thex-y plane. i. For the instant shown, rank points P. Q. R, and S according to the magnitude of the a. magnetic field at these points, from largest to smallest. If the magnetic field is zero at any of these points, state that explicidy. Explain your reasoning. i. For the instant shown, rank points P. Q. R, and S according to the magnitude of the electric field at these points, from largest to smallest. If the electric field is zero at any of these points, state that explicidly. Explain your reasoning. In which direction is the electromagnetic wave propagating? Explain how you can tell. b. CPretsice Hail, lac. First Edition, 2003 Tiusorials in Inaroductory Physics McDermott, Shaffer, and P.E.G., U. Wash

Answer 1

ZERO t r Но

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