Contents 1 Atomic and molecular physics 2 Optical physics 3 History 3.1 Classical oscillator model of matter 3.2 Early quantum model of matter and light 4 Modern treatments 5 Isolated atoms and molecules 6 Electronic configuration 7 See also 8 Notes 9 References 10 External links Atomic and molecular physics[edit]
Main articles:
The
One of the earliest steps towards atomic physics was the recognition
that matter was composed of atoms, in modern terms the basic unit of a
chemical element. This theory was developed by
k = n π L displaystyle k= frac npi L can occur in the box, where n is a positive integer (mathematically denoted by n ∈ N 1 displaystyle scriptstyle nin mathbb N _ 1 ). The equation describing these standing waves is given by: E = E 0 sin ( n π L x ) displaystyle E=E_ 0 sin left( frac npi L xright),! . where E0 is the magnitude of the electric field amplitude, and E is
the magnitude of the electric field at position x. From this basic,
ν displaystyle nu with a photon of energy h ν displaystyle hnu . In 1917 Einstein created an extension to Bohrs model by the
introduction of the three processes of stimulated emission,
spontaneous emission and absorption (electromagnetic
radiation).[14]:11
Modern treatments[edit]
The largest steps towards the modern treatment was the formulation of
quantum mechanics with the matrix mechanics approach by Werner
Heisenberg and the discovery of the
Born–Oppenheimer approximation
Notes[edit] ^ Atomic, molecular, and optical physics. National Academy Press.
1986. ISBN 0-309-03575-9.
^ a b c d e f g Editor: Gordon Drake (Various authors) (1996).
Handbook of atomic, molecular, and optical physics. Springer.
ISBN 0-387-20802-X. CS1 maint: Extra text: authors list
(link)
^ Chen, L. T. (ed.) (2009). Atomic, Molecular and Optical Physics: New
Research. Nova Science Publishers.
ISBN 978-1-60456-907-0. CS1 maint: Extra text: authors list
(link)
^ C.B. Parker (1994). McGraw Hill Encyclopaedia of
References[edit] Bransden, B. H.; Joachain, CJ (2002).
External links[edit] Wikimedia Commons has media related to Atomic physics. MIT-Harvard Center for Ultracold Atoms
Lorentz and Drude Models (see and listen to Lecture 2)
Nonlinear and Anisotropic Materials (see and listen to Lecture 3)
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