Two small identical speakers are connected (in phase) to the same source. The speakers are 3 m apart and at ear level. An observer stands at X, 4 m in front of one speaker as shown. If the amplitudes are not changed, the sound he hears will be least intense if the wavelength is:
A) 1 m
B) 2 m
C) 3 m
D) 4 m
E) 5 m

Question

Two small identical speakers are connected (in phase) to the same source. The speakers are 3 m apart and at ear level. An observer stands at X, 4 m in front of one speaker as shown. If the amplitudes are not changed, the sound he hears will be least intense if the wavelength is: 
A) 1 m 
B) 2 m 
C) 3 m 
D) 4 m 
E) 5 m

Quizplus · Accepted Answer

The Answer of Two small identical speakers are connected (in phase) to the same source. The speakers are 3 m apart and at ear level. An observer stands at X, 4 m in front of one speaker as shown. If the amplitudes are not changed, the sound he hears will be least intense if the wavelength is: 
A) 1 m 
B) 2 m 
C) 3 m 
D) 4 m 
E) 5 m

Two Small Identical Speakers Are Connected (In Phase) to the Same