Question regarding particles and wavelength

[yungwun22]

Homework Statement

I know about particle/wave duality; however, when I read a passage and it says the wavelength of the particle I'm not sure what it's referring to. Is it the actual wavelength of the particle or the wavelength of the wavefunction for a particular eigenvalue?

Homework Equations

The Attempt at a Solution

 

[Dick]

It's the wavelength of a wavefunction corresponding to a particular momentum eigenstate of the particle. So, yes, the latter. See de Broglie.