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10. A sinusoidal electromagnetic plane wave with an amplitude of 1.0 V/m and a
wavelength of 2.0 m travels in the positive z-direction in vacuum. (a) Write
an expression for E(zit) if the E-field is in the x-direction and bf E(0,0) =0.
(b) Wirte an expression for B(zit). (c) Verify that E x B is in the direction
of propagation.

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