Wave Mechanics Question 614
Question: A closed organ pipe (closed at one end) is excited to support the third overtone. It is found that air in the pipe has
Options:
A) three nodes and three antinodes
B) three nodes and four antinodes
C) four nodes and three antinodes
D) four nodes and four antinodes
Show Answer
Answer:
Correct Answer: D
Solution:
Third overtone has a frequency 7n, which means $ L=\frac{7\lambda }{4} $ = three full loops + one half loop, which would make five nodes and four antinodes.
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