Question

What will be the third overtone of a closed organ pipe?

Answer 1

3rd overtonr of closed = 2nd harmonic of open

$7( \frac{v}{lc} ) = 2 \binom{v}{lo}$

$= \frac{lc}{lo} = \frac{7}{4}$

Closed organ pipe -

Closed organ pipe -A closed organ pipe is a cylindrical tube having an air colume with one end closed.

wherein

Condition of constructive interference

$l = (2n + 1) \frac{λ}{4}$

$= \frac{7}{4}$

HOPE IT HELPS