Two loudspeakers are placed at either end of a gymnasium, both pointing toward the center of the gym and equidistant from it. The speaker emits 266-Hz sound that is in phase. An observer at the center of the gym experiences constructive interference. how far toward either speaker must the observer walk to first experience destructive interference?

Question

anonymous · Answer

i can do this but its physics question right?

anonymous · Answer

ya.. a physics question.. can you help me?

anonymous · Answer

lol ill try

anonymous · Answer

distance might be interms of x is that alright?

anonymous · Answer

oh nvm sorry this is uni level question

anonymous · Answer

joe could help u?

anonymous · Answer

that the one i don't know.. em, it shall use which formula? is it
 $$\kappa=v/f$$

anonymous · Answer

wavelength = velocity of sound in air / frequency

anonymous · Answer

thats wavelength = velocity over frequency i used that but i am not sure what to do

anonymous · Answer

yes

anonymous · Answer

hmm....this is more of a physics question >.< i would need to know certain formulas.  ill see if i can find anything.

anonymous · Answer

lol i looked up on wikipedia but didnt help

anonymous · Answer

http://en.wikipedia.org/wiki/Doppler_effect

anonymous · Answer

i think u have to use this

anonymous · Answer

okey... i'll try..

anonymous · Answer

I know that velocity = (wavelength)(frequency), and the path length difference for the case of destructive interference is =0.5(wavelength).

anonymous · Answer

sorry u'll have to take it from there

anonymous · Answer

okey.. got it...

anonymous · Answer

really was tht helpful?

anonymous · Answer

http://webphysics.davidson.edu/physlet_resources/bu_semester2/c25_interference_doublesource.html i believe this will help