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

question 9

Multiple Choice

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