- Molecular physics
Molecular physics is the study of the physical properties of molecules and of the chemical bonds between atoms. Its most important experimental techniques are the various types of spectroscopy. The field is closely related to atomic physics and overlaps greatly with theoretical chemistry, physical chemistry and chemical physics.
Additionally to the electronic excitation states which are known from atoms, molecules are able to rotate and to vibrate. These rotations and vibrations are quantized, there are discrete energy levels. The smallest energy differences exist between different rotational states, therefore pure rotational spectra are in the far infrared region (about 30 - 150 µm wavelength) of the electromagnetic spectrum. Vibrational spectra are in the near infrared (about 1 - 5 µm) and spectra resulting from electronic transitions are mostly in the visible and ultraviolet regions. From measuring rotational and vibrational spectra properties of molecules like the distance between the nuclei can be calculated.
Wikimedia Foundation. 2010.
Look at other dictionaries:
Molecular Physics — Titre abrégé Mol. Phys. Discipline Chimie physique … Wikipédia en Français
molecular physics — molekulinė fizika statusas T sritis fizika atitikmenys: angl. molecular physics vok. Molekülphysik, f rus. молекулярная физика, f pranc. physique moléculaire, f … Fizikos terminų žodynas
Molecular Physics (journal) — Abbreviated title (ISO) Mol. Phys. Discipline … Wikipedia
Electrostatic deflection (molecular physics/nanotechnology) — In molecular physics/nanotechnology, electrostatic deflection is the deformation of a beam like structure/element bent by an electric field. It can be due to interaction between electrostatic fields and net charge or electric polarization effects … Wikipedia
Molecular dynamics — (MD) is a computer simulation of physical movements of atoms and molecules. The atoms and molecules are allowed to interact for a period of time, giving a view of the motion of the atoms. In the most common version, the trajectories of molecules… … Wikipedia
Molecular Simulation — Titre abrégé Mol. Simul. Discipline Chimie théorique … Wikipédia en Français
Molecular attraction — occurs when neutrally charged molecules nevertheless experience the uneven distribution of electrons over their structure due to London Forces induced by random variations of electron density occurring in non polar compounds, hydrogen bonding due … Wikipedia
Molecular binding — is an attractive interaction between two molecules which results in a stable association in which the molecules are in close proximity to each other. The result of molecular binding is formation of a molecular complex. Contents 1 Types 2 Examples … Wikipedia
Molecular autoionization — is a reaction between molecules of the same substance to produce ions and is created by semipolar bonds. The oxidation number on all atoms in such a reaction remains unchanged. Such autoionization can be protic (H+ transfer), or non protic. Some… … Wikipedia
physics — /fiz iks/, n. (used with a sing. v.) the science that deals with matter, energy, motion, and force. [1580 90; see PHYSIC, ICS] * * * I Science that deals with the structure of matter and the interactions between the fundamental constituents of… … Universalium