Planck-constant

N = Aoogadro number h = Planck constant c = velocity of light... 

Figure 8 Effects of spin diffusion. The NOE between two protons (indicated by the solid line) may be altered by the presence of alternative pathways for the magnetization (dashed lines). The size of the NOE can be calculated for a structure from the experimental mixing time, and the complete relaxation matrix, (Ry), which is a function of all mterproton distances d j and functions describing the motion of the protons, y is the gyromagnetic ratio of the proton, ti is the Planck constant, t is the rotational correlation time, and O) is the Larmor frequency of the proton m the magnetic field. The expression for (Rjj) is an approximation assuming an internally rigid molecule.

Electrons are very light particles and cannot be described by classical mechanics. They display both wave and particle characteristics, and must be described in terms of a wave function, T. Tlie quantum mechanical equation corresponding to Newtons second law is the time-dependent Schrbdinger equation (h is Plancks constant divided by 27r). 

In the above equation, h is the Planck constant, and c the speed of light. The mean values at the absolute temperature T are obtained from the same equations by the of (j + 1/2) by... 

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