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Sound Waves — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsSound Waves2 Marks
Question
The separation between a node and the next antinode in a vibrating air column is 25cm. If the speed of sound in air is 340m/s, find the frequency of vibration of the air column.
✓

Answer

$\text{v}=340\text{m/s}$

Distances between two nodes or antinodes

$\Rightarrow\frac{\lambda}{4}=25\text{cm}$

$\Rightarrow\lambda=100\text{cm}=1\text{m}$

$\Rightarrow\text{n}=\frac{\text{v}}{\lambda}=340\text{Hz}.$

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