For sinusoids For sinusoidal signals, when the phase difference is 180° ( radians), one says that the phases are opposite, and that the signals are in antiphase. Then the signals have opposite signs, and destructive interference occurs. Conversely, a phase reversal or phase inversion implies a 180-degree phase shift.
For sinusoids For sinusoidal s:ignals, when the p.hase difference is 180° !( radians), one .says that the phases are opposite, and that the signals are in antiphase. Then the signals have opposite signs, and destructive interference occurs. Conversely, :a phase reversal or phase inversion implies a 180-degree phase shift.