Standing and Stationary Waves in an open tube - A Level Physics
This video explains standing and stationary waves in an open tube (or open pipe) for A Level Physics.
Standing waves on a string are fixed at both ends. Standing waves and stationary waves in an open tube or an open pipe are only fixed at one end (the closed end of the tube or pipe). This means that there must be a node at the closed end and an antinode at the open end. The number of nodes and antinodes in standing waves depends on whether the wave is fixed or not at one or both ends.
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What you've drawn are the 1st, 3rd and 5th harmonics. For a tube open at only one end, the even harmonics don't form. The reason we count them this way is because the definition for higher harmonics is in terms of frequency: fn = n*f1. If you look at the waves you've drawn, the wavelength is 4L, then 4L/3, then 4L/5. So wavelength decreases by a factor of 3, then by a factor of 5 from the fundamental. This means that, if we call the frequency of the fundamental f1, the frequencies of the harmonics you drew are 3f1 and 5f1. So they correspond to the 3rd and 5th harmonic.
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Thank you so much for posting these videos, they have been extremely useful!
I believe that the diagrams you have drawn represent the first, third and fifth harmonics. Thank you for the rest of the video though, I appreciate it.
Aren't these Stationary Waves in a CLOSED tube?
your videos are really useful, thanks a lot.
Your videos are extremely helpful, thank you for making them! :D
You are really motivating me to learn more about this.. This is very interresting!
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Wait so the first one is the fundamental frequency, third frequency then fifth?
Dessa filmer är riktigt bra och jag hoppas få se mer i framtiden . Fortsätt med det goda arbetet .
Isn't it Fundamental > First Overtone > Second Overtone? So I'm assuming that 2nd Harmonic is another word for First Overtone?
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I must say, this video was very helpful. Subscribed!!!!
Why does the top have to be an antinode?
This video is for closed pipe is it?
How come you can't set up a standing wave at a tube length of λ/2? (I understand this is between the two harmonics, but how would you word this for an explanation?)
What you have as the 2nd Harmonic (L=3lamda/4), according to my textbook is the Third Harmonic (first overtone)...I don't understand
. 1st you showed a vessel open at one end which showed one node and one antinode. and again at the same vessel you showed 2 of them each ... ?