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Two vibrating modes of an air column are shown in figure. What is the ratio of frequency of two notes ? |
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Answer» In mode (a), `l=lambda//2+lambda//4=3lambda//4, lambda=(4l)/(3)` `n_(1)=(upsilon)/(lambda)=(3upsilon)/(4l)` In mode (b), `l=lambda//2+lambda//2+(lambda)/(4)=(5lambda)/(4), lambda=(4l)/(5)` `n_(2)=(upsilon)/(lambda)=(5upsilon)/(4l) :. (n_(1))/(n_(2))=(3)/(5)` |
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