The air in a tube open at both ends is sent into its fundamental resonance.One end of the tube is then closed and the air column is again set into its fundamental resonance.The resonant frequency ____ after the end is closed.
A)halves
B)stays the same
C)doubles
D)increases by a factor of 1.4

Question

Quizplus · Accepted Answer

When one end of the tube is closed, the fundamental frequency halves because the tube goes from supporting a half-wavelength (open at both ends) to a quarter-wavelength (one end closed), effectively doubling the wavelength and halving the frequency.

The Air in a Tube Open at Both Ends Is