An air columnis constructed by fitting a movable piston in along cylindrical tube. Longitudinal waves are sent in the tube by as tunning fork of frequency 416 Hz. How far from the open end should the piston, be so that the air column in the tube may vibrate in its fitst overtone? Speed of soud in air is `333ms^-1`.

Explanation

Here, `lambda=(upsilon)/(v)=(333)/(416)=0.8m.`
For vibrating in first overtone mode,
`L=(3lambda)/(4)=(3xx0.8)/(4)=0.62m`