Macroscopic object wave function - Physics Forums
2020年1月15日 · The macroscopic object wave function is derived from the Schrödinger equation, which is a fundamental equation in quantum mechanics. The equation describes the evolution of the wave function over time and can be used to calculate the probability of finding a macroscopic object in a particular state.
Heisenberg Uncertainty Principle and macroscopic objects
2024年12月14日 · 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.
Is General Relativity Exclusively a Macroscopic Theory? - Physics …
2004年11月23日 · Macroscopic observations involve using our senses to gather information about objects or phenomena that are visible to the naked eye. Microscopic observations, on the other hand, require the use of specialized equipment, such as microscopes, to gather information about objects or phenomena that are too small to be seen with the naked eye.
The difference between microscopic and macroscopic cross sections.
2010年10月31日 · 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.
Microscopic and macroscopic physics - Physics Forums
2020年8月13日 · Microscopic and macroscopic physics are interconnected and complement each other. Macroscopic properties and behaviors of matter are a result of the interactions and behaviors of microscopic particles. Understanding the microscopic world helps us explain and predict macroscopic phenomena.
Calculation of neutron transport cross section - Physics Forums
2013年7月12日 · The transport cross sections for water and heavy water are 0.45cm and 2.6cm. These values can be calculated using the equation macroscopic cross section = 1/mean free path, or specifically for water, 1-cos(theta) = 0.324, and for heavy water, 1-cos(theta) = 0.116. However, these values may differ from those in the cited text.
Heisenberg uncertainty principle -- Questions about a practical …
2024年11月16日 · Whatever happens when the box is opened has already happened before the box is open. The cat effectively measures whether the sample has decayed or not. And QM at the level of an individual atom has somehow transformed into the definiteness of the macroscopic world: either the sample decayed or it didn't. Either tha cat died or it didn't.
The Density of a Nucleus: A Question About Steps in Calculating …
2019年7月20日 · There is relatively little empty space between atoms in solids and liquids, so that the average density of an atom is about the same as matter on a macroscopic scale—approximately 10^3 kg/m^3 . The nucleus of an atom has a radius about 10^-5 that of the atom and contains nearly all the mass of the entire atom.
Stiffness of a single interatomic spring - Physics Forums
2012年2月25日 · This results in a stiffness constant of approximately 2.83 N/m for a single interatomic bond in iron. This value is obtained by considering the wire as a very stiff macroscopic spring and using the relationships between the stiffness of the whole wire, the number of side-by-side chains, and the number of interatomic bonds in
Does Decoherence get rid of all Quantumness? - Physics Forums
2020年7月29日 · Here, we have extended the macroscopic system “Alice” of the conventional proposals to an even larger macroscopic system Aa (that is, Alice plus the qubit a). This effectively debilitates the decoherence mechanism’s ability to reach “classicality”, since it only leads to a loss of coherence between Alice and the microscopic subsystems.