Fully destructive interference between two sinusoidal waves of the same frequency and amplitude occurs only if they:
A)travel in the same direction and are 270 ° out of phase
B)travel in the same direction and are 45 ° out of phase
C)travel in the same direction and are in phase
D)travel in the same direction and are 180 ° out of phase
E)travel in the same direction and are 90 ° out of phase

Question

Fully destructive interference between two sinusoidal waves of the same frequency and amplitude occurs only if they:
A)travel in the same direction and are 270 °  out of phase
B)travel in the same direction and are 45 ° out of phase
C)travel in the same direction and are in phase
D)travel in the same direction and are 180 ° out of phase
E)travel in the same direction and are 90 ° out of phase

Quizplus · Accepted Answer

Fully destructive interference between two waves of equal frequency and amplitude occurs when they are 180 degrees out of phase and travel in the same direction.

Fully Destructive Interference Between Two Sinusoidal Waves of the Same