I've been asked a question by a student - it's off the beaten track, and I am struggling to get a definitive answer, even off other physics teachers...

If we have an open tube, so open at both ends, how can we end up with a standing wave being formed in this tube?

How can the initial wave reflect back and cause the formation of a standing wave?

I have my own ideas - but i am never happy with going with what i think, i always try and get the idea validated and hopefully approved!





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