InterviewSolution
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InterviewSolution
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Let the two waves `y_(1) = A sin ( kx - omega t)` and `y_(2) = A sin ( kx + omega t)` from a standing wave on a string . Now if an additional phase difference of `phi` is created between two waves , thenA. the standing wave will have a different frequencyB. the standing wave will have a different amplitude for a given pointC. the spacing between two consecutives nodes will changeD. None of the above |
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Answer» Correct Answer - B Initially the standing wave equation is ` y = 2 A sin kx cos omega t` If phase difference `phi` is added to one of waves , then resulting standing wave equation is ` y = 2 A ( kx + (phi)/(2)) cos ( omega t - (phi)/( 2))` Here, frequency does not change and also spacing between two successive nodes not change as its value for both is `pi//k`. But for a particle , in standing wave , amplitude changes. |
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