Question 35
SoundIn Fig. 7, a resonance tube experiment is performed using one tuning fork. As the water level is lowered the first resonance is obtained when the length of the air column l = λ/4. The second resonance is obtained when l equals
- A.λ/2
- B.3λ/4
- C.λ
- D.3λ/2.
Show the answer and explanation
Answer: B (3λ/4)
Explanation
A tube closed at one end resonates at λ/4, 3λ/4, 5λ/4…, so the second resonance is at 3λ/4.