急性
发表于 2025-4-1 03:43:26
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Mindfulness
发表于 2025-4-1 08:12:52
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细节
发表于 2025-4-1 10:15:08
Simple Applications of Perturbation Theory,. but by a much more complicated function .(.). The former expression is valid only when x is small. In order to make more precise the expression for the potential energy .(.) we can take into account, besides the term ½μω., also higher terms in the expansion of .(.) in powers of the displacement .:
obtuse
发表于 2025-4-1 16:10:12
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AWE
发表于 2025-4-1 22:27:10
Emission, Absorption and Scattering of Light by Atomic Systems,without the use of supplementary ideas relating to laws of creation and annihilation of electromagnetic fields. We can, however, make considerable progress on the basis of Einstein’s semiphenomenological theory of radiation, which is essentially founded on the laws of conservation of energy and mome
Armada
发表于 2025-4-1 22:42:33
The Many-Body Problem,n classical mechanics, to consider a system of . particles as a single particle with 3. degrees of freedom (neglecting the spin of the particles, otherwise with 4. degrees of freedom). All the general results of quantum mechanics which are valid for systems with several degrees of freedom can be app