Suppose that the separation between two speakers A and B is 6.60 m and the speakers are vibrating in-phase. They are playing identical 126-Hz tones and the speed of sound is 343 m/s. An observer is seated at a position directly facing speaker B in such a way that his line of sight extending to B is perpendicular to the imaginary line between A and B. What is the largest possible distance between speaker B and the observer, such that he observes destructive interference

Complete question

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The largest possible distance is

Explanation:

From the question we are told that

   The separation between Speaker at  position  A and B  is  AB =  6.60 m

   The frequency of the tune which the speaker are playing is

    The speed of sound is

Generally the wavelength of the tune playing is mathematically represented as

=>        

=>        

Let the observer be at position D

Generally the distance A and  is mathematically  evaluated using  Pythagoras theorem as

Let BC = e

So  

Generally the path difference between the first and the second speaker from the observer point of view is mathematically represented as

=>    

Generally the condition for destructive interference is mathematically represented as

Here n is the order of the fringe which is  one

=>        

=>        

=>        

=>        

=>          

which statement about this sum is true? −245+2.7

the electric field is a “force field” around a charged object that illustrates the direction the electric force would push an imaginary