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In physics, the thermal de Broglie wavelength (, sometimes also denoted by ) is a measure of the uncertainty in location of a particle of thermodynamic average momentum in an ideal gas. [1] It is roughly the average de Broglie wavelength of particles in an ideal gas at the specified temperature.
The de Broglie wavelength is the wavelength, λ, associated with a particle with momentum p through the Planck constant, h: =. Wave-like behavior of matter has been experimentally demonstrated, first for electrons in 1927 and for other elementary particles , neutral atoms and molecules in the years since.
The de Broglie relation, [10] [11] [12] also known as de Broglie's momentum–wavelength relation, [4] generalizes the Planck relation to matter waves. Louis de Broglie argued that if particles had a wave nature, the relation E = hν would also apply to them, and postulated that particles would have a wavelength equal to λ = h / p .
Louis de Broglie postulated that all particles with a specific value of momentum p have a wavelength λ = h/p, where h is the Planck constant. This hypothesis was at the basis of quantum mechanics. Nowadays, this wavelength is called the de Broglie wavelength. For example, the electrons in a CRT display have a De Broglie wavelength of about 10 ...
The De Broglie relations give the relation between them: ... λ = wavelength of emitted photon, during electronic transition from E i to E j ...
Here, V is the volume of the container holding the molecule (volume per single molecule so, e.g., for 1 mole of gas the container volume should be divided by the Avogadro number), Λ is the Thermal de Broglie wavelength, h is the Planck constant, m is the mass of a molecule, k B is the Boltzmann constant and T is the absolute temperature. This ...
One can calculate the average separation between these particles by deducing the de-Broglie wavelength: = /, here m is the mass of the dark matter particle and v is the dispersion velocity of the halo.
The quantum concentration n Q is the particle concentration (i.e. the number of particles per unit volume) of a system where the interparticle distance is equal to the thermal de Broglie wavelength. Quantum effects become appreciable when the particle concentration is greater than or equal to the quantum concentration, which is defined as: [1]
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