Two waves of the same frequency have opposite phase when the phase angle between them is
A. 360°
B. 180°
C. 90°
D. 0°
Answer:B
Two waves of the same frequency have opposite phase when the phase angle between them is
A. 360° B. 180° C. 90° D. 0°
Explanation: If two sine waves have the same frequency but different phases, their summation is another sine wave with the same base frequency but a different amplitude and phase.