I was reading this answer of David Z about meaning of "Quantum" that this question came in mind:
If light is quantized (i.e. is a integer multiples of some unit $\hbar c/k$), are other kinds of energy quantized too?
I think all kinds of energy should be quantized because they can convert to each other and if one of them is quantized, all other kinds must be so. Is this correct?
If that is correct, then what is a quantum of kinetic or potential or internal energy of a body with mass $m$? E.g. is kinetic energy of a translating body ($K=\frac 12mv^2$) a integer multiples of some unit?
