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

question 46

Multiple Choice

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.