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2 loudspeakers are emitting sound waves of wavelength lambda with an initial phase difference of `pi/2` at what minimum distance from O on line AB will one hear a maximum A. `25lambda`B. `(100lambda)/sqrt(15)`C. `(25lambda)/3`D. `50 lambda` |
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Answer» Correct Answer - C `Deltaphi=2npi` `Rightarrowpi/2+(2pi)/lambdad sin theta=2npi` `(2pi)/lambdadsintheta=(2n-1/2)pi` `sintheta=(2n-1/2)lambda/(2d)=1/2xxlambda/(2xx3lambda)=1/12` `Rightarrowy/sqrt((100lambda))^(2)=1/12` `144y^(2)=(100lambda)^(2)` `yapprox(100lambda)/12 = (25lambda)/3` |
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