If two identical waves with a phase difference of 3$\pi$ are added,the result is
A)a wave with the same frequency but twice the amplitude.
B)a wave with the same amplitude but twice the frequency.
C)a wave with zero amplitude.
D)a wave with an intensity equal to the sum of the intensities of the two waves.
E)This problem cannot be solved without knowing the wavelengths of the two waves.

Question

Quizplus · Accepted Answer

When two identical waves with a phase difference of 3π are added, they interfere destructively and result in a wave with zero amplitude. This is because the crest of one wave coincides with the trough of the other wave, resulting in cancellation. The frequency and intensity of the wave remain the same, but the amplitude is zero.

If Two Identical Waves with a Phase Difference of 3 π\piπ

If Two Identical Waves with a Phase Difference of 3 $\pi$