Draw waveform for standing waves on an open and shorted line. Prove that impedance is inverted at every quarter wavelength interval.

Waveform-

Explanation

When the transmission line is short circuited voltage is zero and current is maximum.The variation is according to the wavelength. When the transmission line is open circuited voltage is maximum and current is zero.The pattern repeats for every half wavelength. Thus impedance is inverted at every quarter wavelength interval.