Moderate
Two waves of the same frequency have opposite phase when the phase angle between them is_________?
Correct answer: B. 180°
- A. 360°
- B. 180°
- C. 90°
- D. 0°
Explanation
Opposite phase means one wave is at its positive peak when the other is at its negative peak, corresponding to a phase separation of 180°. A 360° difference represents the same phase, not opposite phase.
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