Two separated sources emit sinusoidal traveling waves that have the same wavelength $\lambda$ and are in phase at their respective sources. One travels a distance to get to the observation point while the other travels a distance The amplitude is a minimum at the observation point if is:
A) an odd multiple of $\lambda$/2
B) an odd multiple of $\lambda$/4
C) a multiple of $\lambda$
D) an odd multiple of $\pi$/2
E) a multiple of $\pi$

Question

Two separated sources emit sinusoidal traveling waves that have the same wavelength $\lambda$ and are in phase at their respective sources. One travels a distance  to get to the observation point while the other travels a distance  The amplitude is a minimum at the observation point if  is:
A) an odd multiple of $\lambda$/2 
B) an odd multiple of $\lambda$/4 
C) a multiple of $\lambda$ 
D) an odd multiple of $\pi$/2 
E) a multiple of $\pi$

Quizplus · Accepted Answer

The Answer of Two separated sources emit sinusoidal traveling waves that have the same wavelength $\lambda$ and are in phase at their respective sources. One travels a distance  to get to the observation point while the other travels a distance  The amplitude is a minimum at the observation point if  is:
A) an odd multiple of $\lambda$/2 
B) an odd multiple of $\lambda$/4 
C) a multiple of $\lambda$ 
D) an odd multiple of $\pi$/2 
E) a multiple of $\pi$

Two Separated Sources Emit Sinusoidal Traveling Waves That Have the Same