Heisenberg Uncertainty Principle and macroscopic objects - Physics Forums The de Broglie wavelength of a macroscopic solid body gives you the uncertainty of its center of mass You can check that by transforming the system into center of mass and reduced coordinates This is a linear canonical transformation of the spatial coordinats, and the Schrödinger equation of non-relativistic QM is invariant under those
The difference between microscopic and macroscopic cross sections. The macroscopic cross-section (Σ) has units of cm-1 is derived from the microscopic section according to Σ = N σ, where N is the atomic density of a particular nuclide The reaction rate for a give interaction = Σ Φ, where Φ is the neutron flux These forumla work well for average or thermal neutron energies
Microscopic and macroscopic physics - Physics Forums Quantum Mechanics seems to explain phenomenon happening on a microscopic scale, where measurements aren't definite and probability plays a role Classical physics explain macroscopic phenomenon where measurements are definitive without probability of that event happening Is it happening just
Calculation of neutron transport cross section - Physics Forums macroscopic cross section=1 mean free path for water 1-cos(theta)=0 324 and 0 116 for heavy water Its not right to use theta in thermal energy because in thermal area of energy scattering is isotropic!
Understanding the Uncertainty Principle: Microscopic vs. Macroscopic . . . perhaps you meant micrscopic and macroscopic level Uncertainty principle works operate at microscopic level- in classical world -macroscopic level the uncertainties are not important as its value is so small(due to Planck's constant h) that it becomes meaningless a few examples are there -but i can not vouch for its simplicity-
Uncertainty principle at the macroscopic level - Physics Forums what will be the scenario if Heisenberg's uncertainty principle is applied at macroscopic level? Insights Blog -- Browse All Articles -- Physics Articles Physics Tutorials Physics Guides Physics FAQ Math Articles Math Tutorials Math Guides Math FAQ Education Articles Education Guides Bio Chem Articles Technology Guides Computer Science Tutorials
Field of contact forces - Physics Forums Friction and contact forces are macroscopic phenomena arising due to electromagnetic interactions They depend on the local geometry of the contact surfaces, etc There's no sensible way to bundle this into a field: the interactions between the bodies are discrete But at the microscopic level, you are dealing with electric and magnetic field
How does one make a macroscopic object? - Physics Forums All the H-theorem says is, that if you consider only a coarse-grained picture of the evolution of a closed system, i e , look at a subset of "relevant" macroscopic observables as an average sum over many microscopic observables (e g , some body consisting of ##10^{23}## molecules is described by its center of mass and the total momentum only
Converting Between K-Space Sum and Integral for Macroscopic Solids How is it exactly i convert between a k-space sum an integral? Assume that we have some macroscopic solid Periodic boundary conditions leads to kx,ky,kz = 2π L, so each k-space state fills a volume (2π L)3 or has a density of V (2π)3 To then count for instance the number of state with