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The transmission line has a length, lambda over 2, and impedance, Z sub 0 equals 50 ohms. The generator shows a 2 V sinusoidal voltage source in series with a 50-ohm resistor. The incident power is P sub a v sup i, while reflected power is P sub a v sup r. The average power beyond the load terminals is P sub a v sup t, while input impedance beyond load terminals is labeled Z sub in equals 100 ohms to infinity.