Determine a planck's constant?

Energy/frequency or energy*wavelength/speed of light.

Planck's constant describes the ratio between the energy of an electromagnetic wave and the frequency of that wave.

Planck's Constant defines a minimum momentum moment h=mvw where w is wavelength. Planck's Constant is the product of electric charge Q and magnetic charge W (Weber voltsecond). The Planck energy E=...

The reduced Planck constant simplifies the mathematics found in quantum physics calculations by adding a 2pi term into it. Instead of worrying about that 2pi constant, formulas using the reduced...

Planck's Constant is dimensionally equal to Angular Momentum. The unit is Joules second.