- #1
dilloncyh
- 39
- 0
In class I learn that we can get the dispersion relation for particles by using E=hbar*w and p=hbar*k. The calculated phase velocity is w/k = hbar*k/2m, while the group velocity is dw/dk=hbar*k/m. All these make sense to me, except one thing: I always thought that E=hbar*w=hf is only applicable to photons, which are massless. Why can we apply this equation to non-massless particles to obtain such a dispersion relation?