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  • What exactly is Plancks constant? how did they calculate it?
    Planck's constant is a "resolution limit" to the Universe The following is a very loose explanation of how that works There's a fair bit of understanding that quantum theory is best understood as an informational theory, and from this perspective we can consider that Planck's constant sets the maximum amount of information that is allocated
  • Energy, frequency, and Plancks constant - Physics Forums
    Boltzmann's constant on the other hand, doesn't directly relate energy to temperature, and the exact relation depends on the system I'm trying to establish: 1) Is there some physical justification for eliminating Planck's constant? i e is there some intuitive reason why energy and frequency are simply two forms of the same thing
  • Why is the Planck constant an exact number with defined value?
    Planck's constant relates two different types of quantities, namely energy and frequency That means it is a conversion factor which converts the units of quantities from one form to another If the units of these two quantities are separately defined, then one can use measurements to determine the value of the conversion factor
  • What is the point of the reduced Plancks constant $\\hbar$ (h-bar . . .
    A really modern view in quantum physics has indeed to consider quantum vacuum as a superfluid (Planck didn't know this, for this reason "h" is still "in circulation" (using a pun!)) which probably coincides with the ubiquitous scalar field of dark energy, whose mass density $\rho_0$ is expressed in the cosmological constant of Einstein field
  • What Planck Length Is and It’s Common Misconceptions - Physics Forums
    Planck units are defined based on physical constants rather than human-scale phenomena So while the second is originally one-86400th of a day, the Planck time is based on the speed of light, Newton’s gravitational constant, and Planck’s (reduced) constant, which is twice the angular momentum of an electron
  • quantum mechanics - When using Plancks constant, how do I know when to . . .
    Your question is not primarily about Planck's constant, but about the meaning and use of units in physics That is where you should focus your intellectual energy in order to resolve this question You may think you are familiar with units, but I think your question suggests you should try to become even more familiar
  • Can the accuracy in Plancks constant ever be increased?
    Planck's constant's accuracy can indeed be increased As detailed by this website , there are five main different ways of calculating Planck's constant, each with varying levels of uncertainty Approximately every four years, a organization called CODATA (more specifically, its Task Group on Fundamental Constants) publishes the most up-to-date
  • quantum mechanics - Is Plancks Constant Really a Constant? - Physics . . .
    Groenewold is working in the framework of deformation quantization, where the (reduced) Planck constant $\hbar$ is treated as a formal parameter that doesn't have to be the actual physical value $\sim 10^{-34}{\rm Js}$


















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