The fundamental frequency in an open organ
pipe is equal to the third harmonic of a closed organ pipe. If the length of the closed organ pipe is 20 cm, the length of the open organ pipe is
12.5 cm
8 cm
13.2 cm
16 cm
Let length of closed pipe is l
=> of open pipe = of closed pipe
Option 1)
12.5 cm
Option 2)
8 cm
Option 3)
13.2 cm
Option 4)
16 cm