Understanding Standing Wave Patterns at 50Hz Frequency

[Ry122]

In a standing wave, if the fundamental frequency is 25hz
but the frequency that is currently being fed to the string is 50hz how do i determine what the resulting wave will look like?

 

[berkeman]

Which harmonic of 25Hz is 50Hz?

 

[Ry122]

Is it the second one?

 

[berkeman]

Yes. So if the first mode of the fundamental has a half wavelength oscillation in the standing wave, how many wavelengths will there be for a 2nd harmonic standing wave oscillation?

 

[Ry122]

What about for fundamental frequencies that aren't multiples of 50hz.
How do i calculate what waves would be created?

Edit:nevermind this post, too early in the morning for me.