End Correction
Category : JEE Main & Advanced
Due to finite momentum of air molecules in organ pipe reflection takes place not exactly at open end but some what above it. Hence antinode is not formed exactly at the open end rater it is formed at a little distance away from open end outside it.
The distance of antinode from the open end is known as end correction (e). It is given by e = 0.6 r where r = radius of pipe.
Effect length in open organ pipe \[l'=(l+2e)\]
Effect length in closed organ pipe \[l'=(l+e)\]
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