Question: An electromagnetic wave is propagating in the z-direction in a lossy medium with attenuation constant = 0:5 Np/m. If the wave's electric-field amplitude is

An electromagnetic wave is propagating in the z-direction in a lossy medium with attenuation constant α = 0:5 Np/m. If the wave's electric-field amplitude is 100 V/m at z = 0, how far can the wave travel before its amplitude will have been reduced to (a) 10 V/m, (b) 1 V/m, (c) 1 mV/m?

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