A) 1 : 2
B) 2 : 1
C) 2 : 3
D) 4 : 3
Correct Answer: A
Solution :
Avoiding end correction, the length of closed organ pipe is \[{{l}_{1}}=\frac{{{\lambda }_{1}}}{4}\]or\[{{\lambda }_{1}}=4{{l}_{1}}\] The length of open organ pipe is \[{{l}_{2}}=\frac{{{\lambda }_{2}}}{2}\]or\[{{\lambda }_{2}}=2{{l}_{2}}\] Here, \[n1=n2\] \[\Rightarrow \] \[\frac{\upsilon }{{{\lambda }_{1}}}=\frac{\upsilon }{{{\lambda }_{2}}}\] Or \[\frac{\upsilon }{4{{l}_{1}}}=\frac{\upsilon }{2{{l}_{2}}}\] Therefore, \[{{l}_{1}}:{{l}_{2}}=1:2\]
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