- #1
Shing
- 144
- 1
I calculated the energy density of capillary waves with Debye method (pretty much Debye model in 2D), and I assumed there is a frequency cutoff for capillary waves as well. However, when I checked my work with solution I was quite surprised that the solution suggests there is no such a cuttoff!
I have tried so hard to convince myself why; the only way out I can think of is: because capillary waves are visible to naked eye, hence their wavelength is larger than the atom intervals. But it is kind of a lousy try... so why exactly we have no cutoff for Debye theory of capillary waves(ripples of small amplitude and short wavelength on the surface of a liquid)?
I have tried so hard to convince myself why; the only way out I can think of is: because capillary waves are visible to naked eye, hence their wavelength is larger than the atom intervals. But it is kind of a lousy try... so why exactly we have no cutoff for Debye theory of capillary waves(ripples of small amplitude and short wavelength on the surface of a liquid)?