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## Homework Statement

Show from general considerations that the attenuation of power in the rectangular waveguide (TE10 mode propagating in z-direction) is:

P(z)=P(0)exp(-2k''z)

where k'' is the imaginary part of the wavevector in the phasor exp(j(wt-kz))

## Homework Equations

power is proportional to the square of the amplitude

## The Attempt at a Solution

tried squaring the phasor and setting k=k'+k''j but did not get right answer.

Please help!