Q. 66. State any two limitations of end correction.
(1 mark)
Answers
Explanation:
Whenever a wave forms through a medium/object (organ pipe) with a closed/open end, there is a chance of error in the formation of the wave, i.e. it may not actually start from the opening of the object but instead before the opening, thus resulting on an error when studying it theoretically. Hence an end correction is sometimes required to appropriately study its properties. The end correction depends on the radius of the object.
Answer:
Limitations of end correction:
- The tube's inner diameter must be constant.
- Outside of the tube, the effects of airflow and temperature are disregarded.
- The tips of the tuning fork's prongs should be near the tube's centre and a little distance above its rim, perpendicular to the air column there.
End correction occurs because air molecules in the open end of the tube's plane are not completely free to travel in all directions; as a result, reflection occurs at the plane, just a short distance outside the tube.
In order to determine a resonance pipe's resonant frequency, you must add a small distance to the end of the pipe.