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# 12. Use the equation midv/dt +v/t)=-eE for the electron drift velocity, v, to show that the... 12. Use the equation midv/dt +v/t)=-eE for the electron drift velocity, v, to show that the conductivity at frequency, o is (0)= 1+ior 1+(or) Here a = ne' t/m is the DC conductivity. ii. What is plasma and what is meant by plasma frequency? Explain why satellites use the microwave range of frequencies for communication. For a frequency of 50 Gigahertz, what is the corresponding free space wavelength?

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