A vibrating tuning fork of frequency n is placed near the open end of a long cylindrical tube. The tube has a side opening
and is also fitted with a movable reflecting piston. As the piston is moved through 8.75 cm, the intensity of sound changes from a maximum to minimum. If the speed of sound is 350 meter per second, then n is –
Text Solution
Verified by ExpertsThe correct answer is:
B
When the piston is moved through a distance of 8.75 cm, the path difference produced is 
. This must be equal to 
for maximum to change to minimum.
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