Q.
The speed of the sound in air is 333 ms−1. The fundamental frequency of the open pipe is 333 Hz. The second overtone of the open organ pipe can be produced with a pipe of length.
For second overtone n2=2L3v=2n1
Here v = speed of sound in air = 333 ms−1. n1 = fundamental frequency of the open pipe= 333 Hz ∴2L3×333=3×333
or 2L1=1
or L=frac12=0.5m