In the experiment for the determination of the speed of sound in air using the resonance column method, the length of the air column that resonates in the fundamental mode, with a tunig for is `0.1`, when this length is changed to `3.5`m the same tuning fork resonates with the first overtone. Calculate the end correction :

Explanation

End correction `e = (L_(2) - 3L_(1))/(2) = (0.7 - 3(0.2))/(2) = 0.05 `m