In an open organ pipe 
and 
are 
and 
harmonic frequencies, respectively. If 
then length of the pipe is 
mm . (Take velocity of sound in air is 
.)
Text Solution
Verified by ExpertsThe correct answer is:
C
For an open organ pipe, the 
-th harmonic frequency is 
.
The 3rd harmonic is 
and the 6th harmonic is 
.
Taking the difference: 
.
Solving for 
.
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