Observation

(a) (i)       End correction of a resonance tube
The distance between the open end of the resonance tube and the antinode position/vibrating tuning fork.

(ii)       Dimension of end correction
[End correction] = L  

(ii)           Precautions in a resonance tube experiment

• Reading of length taken at eye level.
• Tuning fork struck gently.
• Vibrating prongs of the tuning fork not touching the tube.
• Avoiding parallax when reading the meter rule.
• Resonance tube kept vertical.

(ii)        Calculation of distance
In 4 complete cycles
distance = 4(3)                                               
= 12 cm