Good evening sir...In open organ pipe, how sound wave reflects.Explain sir.

Dear student
 
When one plays a organ pipe, the air that is pushed through the pipevibrates and standing waves are formed. If the both ends of the organare open then the pattern for the fundamental frequency (the lowest frequency and longest wavelength pattern) will have antinodes at the twoopen ends and a single node in between.

Regards
Arun (askIITians forum expert)