1getting the same.
A wall is moving with velocity u & a source of sound is moving with velocity u/2 in the same direction as shown in the figure. Assume sound travels with velocity 10u. The ratio of incident sound of wavelenth on the wall to the reflected sound wavelenth by the wallis
A)9:11 B)11:9 C)4:5 D)5:4
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3 Answers
3(10u - 0.5u)/f = λ..................
wavelength of wave reflected!!!!!!!!!!!!!!!!
let freq. there be f/ = f (10u - u) / (10u - u/2) =f .......................
(10u +u)(9.5)/f(9) = λ/ ...........................
λ/( λ/) = 9.5(9)/11(9.5) = 9/11..................................
beatiful question............y was it untouched for soooo long!!!!!!!
