Two waves with the same frequency and wavelength but with different amplitudes are added. If A₁ = 2A₂ and the waves are 180^o out of phase, then the amplitude of the resultant wave is A) zero. B) the same as A₁. C) the same as A₂. D) equal to A₁ + A₂. E) coherent.

Question

Quizplus · Accepted Answer

When two waves are 180 degrees out of phase, they interfere destructively. The resultant amplitude is the difference between the amplitudes of the two waves: A1 - A2 = 2A2 - A2 = A2.

Two Waves with the Same Frequency and Wavelength but with Different