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120 relations: Absorption (electromagnetic radiation), Acetylene, Allotropes of oxygen, Ammonia, Angular momentum, Angular momentum operator, Anisotropy, Atacama Large Millimeter Array, Atmospheric chemistry, Benzene, Bloch equations, Boltzmann constant, Boltzmann distribution, Bond length, Brooks Pate, Carbon dioxide, Carbon monoxide, Carbon tetrachloride, Carbonyl sulfide, Center of mass, Centrifugal force, Chemical polarity, Chlorine monoxide, Chlorine oxide, Chloromethane, Chlorotoluene, Coriolis force, Cyanopolyyne, Debye, Degenerate energy levels, Diamagnetism, Diatomic molecule, Electric dipole moment, Electric field, Electromagnetic spectrum, Emission spectrum, Energy level, Far infrared, Fictitious force, Fine structure, Fourier-transform infrared spectroscopy, Free induction decay, Frequency, Halogen bond, Hertz, Hewlett-Packard, Hooke's law, Hydrogen bond, Hydrogen cyanide, Hydrogen fluoride, ..., Hydroxyl radical, Hyperfine structure, Infrared spectroscopy, Intermolecular force, Interstellar medium, Ion laser, Isotopologue, Kelvin, Klystron, Lock-in amplifier, Methane, Microwave, Molecular geometry, Molecular symmetry, Molecule, Moment of inertia, Nitric oxide, Nitrogen, Nitrogen dioxide, Nuclear magnetic resonance spectroscopy, Nuclear quadrupole resonance, Optical cavity, Orthogonality, Oxygen, Paramagnetism, Phase (matter), Point particle, Polarizability, Polyatomic ion, Properties of water, Propyne, Quadrupole, Quantum mechanics, Radar, Radio astronomy, Radio telescope, Raman spectroscopy, Rayleigh scattering, Reciprocal length, Rigid rotor, Rotational energy, Rotational–vibrational coupling, Rotational–vibrational spectroscopy, Selection rule, Separable partial differential equation, Silane, Simple harmonic motion, Speed of light, Spherical coordinate system, Spheroid, Spin quantum number, Stark effect, Stokes line, Sulfur hexafluoride, Superheterodyne receiver, System of equations, Tensor, Thermodynamic temperature, Total angular momentum quantum number, Van der Waals force, Vibronic spectroscopy, Walter Gordy, Waveguide, Wavelength, Wavenumber, William Klemperer, Willis H. Flygare, World War II, Zeeman effect, Zero-point energy. Expand index (70 more) »
Absorption (electromagnetic radiation)
In physics, absorption of electromagnetic radiation is the way in which the energy of a photon is taken up by matter, typically the electrons of an atom.
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Acetylene
Acetylene (systematic name: ethyne) is the chemical compound with the formula C2H2.
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Allotropes of oxygen
There are several known allotropes of oxygen.
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Ammonia
Ammonia is a compound of nitrogen and hydrogen with the formula NH3.
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Angular momentum
In physics, angular momentum (rarely, moment of momentum or rotational momentum) is the rotational equivalent of linear momentum.
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Angular momentum operator
In quantum mechanics, the angular momentum operator is one of several related operators analogous to classical angular momentum.
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Anisotropy
Anisotropy, is the property of being directionally dependent, which implies different properties in different directions, as opposed to isotropy.
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Atacama Large Millimeter Array
The Atacama Large Millimeter/submillimeter Array (ALMA) is an astronomical interferometer of radio telescopes in the Atacama Desert of northern Chile.
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Atmospheric chemistry
Atmospheric chemistry is a branch of atmospheric science in which the chemistry of the Earth's atmosphere and that of other planets is studied.
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Benzene
Benzene is an important organic chemical compound with the chemical formula C6H6.
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Bloch equations
In physics and chemistry, specifically in nuclear magnetic resonance (NMR), magnetic resonance imaging (MRI), and electron spin resonance (ESR), the Bloch equations are a set of macroscopic equations that are used to calculate the nuclear magnetization M.
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Boltzmann constant
The Boltzmann constant, which is named after Ludwig Boltzmann, is a physical constant relating the average kinetic energy of particles in a gas with the temperature of the gas.
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Boltzmann distribution
In statistical mechanics and mathematics, a Boltzmann distribution (also called Gibbs distribution Translated by J.B. Sykes and M.J. Kearsley. See section 28) is a probability distribution, probability measure, or frequency distribution of particles in a system over various possible states.
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Bond length
In molecular geometry, bond length or bond distance is the average distance between nuclei of two bonded atoms in a molecule.
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Brooks Pate
Brooks H. Pate is Professor of chemistry at the University of Virginia.
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Carbon dioxide
Carbon dioxide (chemical formula) is a colorless gas with a density about 60% higher than that of dry air.
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Carbon monoxide
Carbon monoxide (CO) is a colorless, odorless, and tasteless gas that is slightly less dense than air.
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Carbon tetrachloride
Carbon tetrachloride, also known by many other names (the most notable being tetrachloromethane, also recognized by the IUPAC, carbon tet in the cleaning industry, Halon-104 in firefighting, and Refrigerant-10 in HVACR) is an organic compound with the chemical formula CCl4.
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Carbonyl sulfide
Carbonyl sulfide is the chemical compound with the linear formula OCS.
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Center of mass
In physics, the center of mass of a distribution of mass in space is the unique point where the weighted relative position of the distributed mass sums to zero, or the point where if a force is applied it moves in the direction of the force without rotating.
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Centrifugal force
In Newtonian mechanics, the centrifugal force is an inertial force (also called a "fictitious" or "pseudo" force) directed away from the axis of rotation that appears to act on all objects when viewed in a rotating frame of reference.
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Chemical polarity
In chemistry, polarity is a separation of electric charge leading to a molecule or its chemical groups having an electric dipole or multipole moment.
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Chlorine monoxide
Chlorine monoxide is a chemical radical with the chemical formula ClO.
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Chlorine oxide
Chlorine and oxygen can bond in many ways.
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Chloromethane
Chloromethane, also called methyl chloride, Refrigerant-40, R-40 or HCC 40, is a chemical compound of the group of organic compounds called haloalkanes.
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Chlorotoluene
Chlorotoluene is a group of three isomeric chemical compounds.
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Coriolis force
In physics, the Coriolis force is an inertial force that acts on objects that are in motion relative to a rotating reference frame.
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Cyanopolyyne
Cyanopolyynes are a group of chemicals with the chemical formula (n.
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Debye
The debye (symbol: D) is a CGS unit (a non-SI metric unit) of electric dipole momentElectric dipole moment is defined as charge times displacement: |- |height.
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Degenerate energy levels
In quantum mechanics, an energy level is degenerate if it corresponds to two or more different measurable states of a quantum system.
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Diamagnetism
Diamagnetic materials are repelled by a magnetic field; an applied magnetic field creates an induced magnetic field in them in the opposite direction, causing a repulsive force.
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Diatomic molecule
Diatomic molecules are molecules composed of only two atoms, of the same or different chemical elements.
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Electric dipole moment
The electric dipole moment is a measure of the separation of positive and negative electrical charges within a system, that is, a measure of the system's overall polarity.
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Electric field
An electric field is a vector field surrounding an electric charge that exerts force on other charges, attracting or repelling them.
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Electromagnetic spectrum
The electromagnetic spectrum is the range of frequencies (the spectrum) of electromagnetic radiation and their respective wavelengths and photon energies.
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Emission spectrum
The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to an atom or molecule making a transition from a high energy state to a lower energy state.
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Energy level
A quantum mechanical system or particle that is bound—that is, confined spatially—can only take on certain discrete values of energy.
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Far infrared
Far infrared (FIR) is a region in the infrared spectrum of electromagnetic radiation.
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Fictitious force
A fictitious force (also called a pseudo force, d'Alembert force, or inertial force) is an apparent force that acts on all masses whose motion is described using a non-inertial frame of reference, such as a rotating reference frame.
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Fine structure
In atomic physics, the fine structure describes the splitting of the spectral lines of atoms due to electron spin and relativistic corrections to the non-relativistic Schrödinger equation.
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Fourier-transform infrared spectroscopy
Fourier-transform infrared spectroscopy (FTIR) is a technique used to obtain an infrared spectrum of absorption or emission of a solid, liquid or gas.
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Free induction decay
In Fourier transform nuclear magnetic resonance spectroscopy, free induction decay (FID) is the observable NMR signal generated by non-equilibrium nuclear spin magnetization precessing about the magnetic field (conventionally along z).
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Frequency
Frequency is the number of occurrences of a repeating event per unit of time.
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Halogen bond
A halogen bond occurs when there is evidence of a net attractive interaction between an electrophilic region associated with a halogen atom in a molecular entity and a nucleophilic region in another, or the same, molecular entity.
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Hertz
The hertz (symbol: Hz) is the derived unit of frequency in the International System of Units (SI) and is defined as one cycle per second.
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Hewlett-Packard
The Hewlett-Packard Company (commonly referred to as HP) or shortened to Hewlett-Packard was an American multinational information technology company headquartered in Palo Alto, California.
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Hooke's law
Hooke's law is a principle of physics that states that the force needed to extend or compress a spring by some distance scales linearly with respect to that distance.
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Hydrogen bond
A hydrogen bond is a partially electrostatic attraction between a hydrogen (H) which is bound to a more electronegative atom such as nitrogen (N), oxygen (O), or fluorine (F), and another adjacent atom bearing a lone pair of electrons.
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Hydrogen cyanide
Hydrogen cyanide (HCN), sometimes called prussic acid, is a chemical compound with the chemical formula HCN.
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Hydrogen fluoride
Hydrogen fluoride is a chemical compound with the chemical formula.
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Hydroxyl radical
The hydroxyl radical, •OH, is the neutral form of the hydroxide ion (OH−).
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Hyperfine structure
In atomic physics, hyperfine structure refers to small shifts and splittings in the energy levels of atoms, molecules and ions, due to interaction between the state of the nucleus and the state of the electron clouds.
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Infrared spectroscopy
Infrared spectroscopy (IR spectroscopy or vibrational spectroscopy) involves the interaction of infrared radiation with matter.
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Intermolecular force
Intermolecular forces (IMF) are the forces which mediate interaction between molecules, including forces of attraction or repulsion which act between molecules and other types of neighboring particles, e.g., atoms or ions.
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Interstellar medium
In astronomy, the interstellar medium (ISM) is the matter and radiation that exists in the space between the star systems in a galaxy.
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Ion laser
An ion laser is a gas laser that uses an ionized gas as its lasing medium.
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Isotopologue
Isotopologues are molecules that differ only in their isotopic composition.
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Kelvin
The Kelvin scale is an absolute thermodynamic temperature scale using as its null point absolute zero, the temperature at which all thermal motion ceases in the classical description of thermodynamics.
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Klystron
A klystron is a specialized linear-beam vacuum tube, invented in 1937 by American electrical engineers Russell and Sigurd Varian,Pond, Norman H. "The Tube Guys".
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Lock-in amplifier
A lock-in amplifier is a type of amplifier that can extract a signal with a known carrier wave from an extremely noisy environment.
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Methane
Methane is a chemical compound with the chemical formula (one atom of carbon and four atoms of hydrogen).
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Microwave
Microwaves are a form of electromagnetic radiation with wavelengths ranging from one meter to one millimeter; with frequencies between and.
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Molecular geometry
Molecular geometry is the three-dimensional arrangement of the atoms that constitute a molecule.
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Molecular symmetry
Molecular symmetry in chemistry describes the symmetry present in molecules and the classification of molecules according to their symmetry.
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Molecule
A molecule is an electrically neutral group of two or more atoms held together by chemical bonds.
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Moment of inertia
The moment of inertia, otherwise known as the angular mass or rotational inertia, of a rigid body is a tensor that determines the torque needed for a desired angular acceleration about a rotational axis; similar to how mass determines the force needed for a desired acceleration.
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Nitric oxide
Nitric oxide (nitrogen oxide or nitrogen monoxide) is a colorless gas with the formula NO.
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Nitrogen
Nitrogen is a chemical element with symbol N and atomic number 7.
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Nitrogen dioxide
Nitrogen dioxide is the chemical compound with the formula.
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Nuclear magnetic resonance spectroscopy
Nuclear magnetic resonance spectroscopy, most commonly known as NMR spectroscopy or magnetic resonance spectroscopy (MRS), is a spectroscopic technique to observe local magnetic fields around atomic nuclei.
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Nuclear quadrupole resonance
Nuclear quadrupole resonance spectroscopy or NQR is a chemical analysis technique related to nuclear magnetic resonance (NMR).
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Optical cavity
An optical cavity, resonating cavity or optical resonator is an arrangement of mirrors that forms a standing wave cavity resonator for light waves.
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Orthogonality
In mathematics, orthogonality is the generalization of the notion of perpendicularity to the linear algebra of bilinear forms.
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Oxygen
Oxygen is a chemical element with symbol O and atomic number 8.
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Paramagnetism
Paramagnetism is a form of magnetism whereby certain materials are weakly attracted by an externally applied magnetic field, and form internal, induced magnetic fields in the direction of the applied magnetic field.
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Phase (matter)
In the physical sciences, a phase is a region of space (a thermodynamic system), throughout which all physical properties of a material are essentially uniform.
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Point particle
A point particle (ideal particle or point-like particle, often spelled pointlike particle) is an idealization of particles heavily used in physics.
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Polarizability
Polarizability is the ability to form instantaneous dipoles.
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Polyatomic ion
A polyatomic ion, also known as a molecular ion, is a charged chemical species (ion) composed of two or more atoms covalently bonded or of a metal complex that can be considered to be acting as a single unit.
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Properties of water
Water is a polar inorganic compound that is at room temperature a tasteless and odorless liquid, which is nearly colorless apart from an inherent hint of blue. It is by far the most studied chemical compound and is described as the "universal solvent" and the "solvent of life". It is the most abundant substance on Earth and the only common substance to exist as a solid, liquid, and gas on Earth's surface. It is also the third most abundant molecule in the universe. Water molecules form hydrogen bonds with each other and are strongly polar. This polarity allows it to separate ions in salts and strongly bond to other polar substances such as alcohols and acids, thus dissolving them. Its hydrogen bonding causes its many unique properties, such as having a solid form less dense than its liquid form, a relatively high boiling point of 100 °C for its molar mass, and a high heat capacity. Water is amphoteric, meaning that it is both an acid and a base—it produces + and - ions by self-ionization.
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Propyne
Propyne (methylacetylene) is an alkyne with the chemical formula H3C≡CH.
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Quadrupole
A quadrupole or quadrapole is one of a sequence of configurations of things like electric charge or current, or gravitational mass that can exist in ideal form, but it is usually just part of a multipole expansion of a more complex structure reflecting various orders of complexity.
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Quantum mechanics
Quantum mechanics (QM; also known as quantum physics, quantum theory, the wave mechanical model, or matrix mechanics), including quantum field theory, is a fundamental theory in physics which describes nature at the smallest scales of energy levels of atoms and subatomic particles.
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Radar
Radar is an object-detection system that uses radio waves to determine the range, angle, or velocity of objects.
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Radio astronomy
Radio astronomy is a subfield of astronomy that studies celestial objects at radio frequencies.
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Radio telescope
A radio telescope is a specialized antenna and radio receiver used to receive radio waves from astronomical radio sources in the sky in radio astronomy.
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Raman spectroscopy
Raman spectroscopy (named after Indian physicist Sir C. V. Raman) is a spectroscopic technique used to observe vibrational, rotational, and other low-frequency modes in a system.
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Rayleigh scattering
Rayleigh scattering (pronounced), named after the British physicist Lord Rayleigh (John William Strutt), is the (dominantly) elastic scattering of light or other electromagnetic radiation by particles much smaller than the wavelength of the radiation.
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Reciprocal length
Reciprocal length or inverse length is a measurement used in several branches of science and mathematics.
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Rigid rotor
The rigid rotor is a mechanical model that is used to explain rotating systems.
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Rotational energy
Rotational energy or angular kinetic energy is kinetic energy due to the rotation of an object and is part of its total kinetic energy.
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Rotational–vibrational coupling
Rotational–vibrational coupling occurs when the rotation frequency of an object is close to or identical to a natural internal vibration frequency.
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Rotational–vibrational spectroscopy
Rotational–vibrational spectroscopy is a branch of molecular spectroscopy concerned with infrared and Raman spectra of molecules in the gas phase.
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Selection rule
In physics and chemistry, a selection rule, or transition rule, formally constrains the possible transitions of a system from one quantum state to another.
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Separable partial differential equation
A separable partial differential equation (PDE) is one that can be broken into a set of separate equations of lower dimensionality (fewer independent variables) by a method of separation of variables.
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Silane
Silane is an inorganic compound with chemical formula, SiH4, making it a group 14 hydride.
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Simple harmonic motion
In mechanics and physics, simple harmonic motion is a special type of periodic motion or oscillation motion where the restoring force is directly proportional to the displacement and acts in the direction opposite to that of displacement.
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Speed of light
The speed of light in vacuum, commonly denoted, is a universal physical constant important in many areas of physics.
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Spherical coordinate system
In mathematics, a spherical coordinate system is a coordinate system for three-dimensional space where the position of a point is specified by three numbers: the radial distance of that point from a fixed origin, its polar angle measured from a fixed zenith direction, and the azimuth angle of its orthogonal projection on a reference plane that passes through the origin and is orthogonal to the zenith, measured from a fixed reference direction on that plane.
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Spheroid
A spheroid, or ellipsoid of revolution, is a quadric surface obtained by rotating an ellipse about one of its principal axes; in other words, an ellipsoid with two equal semi-diameters.
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Spin quantum number
In atomic physics, the spin quantum number is a quantum number that parameterizes the intrinsic angular momentum (or spin angular momentum, or simply spin) of a given particle.
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Stark effect
The Stark effect is the shifting and splitting of spectral lines of atoms and molecules due to presence of an external electric field.
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Stokes line
A Stokes line is the radiation of particular wavelengths present in the line spectra associated with fluorescence and the Raman scattering.
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Sulfur hexafluoride
Sulfur hexafluoride (SF6) is an inorganic, colorless, odorless, non-flammable, extremely potent greenhouse gas, and an excellent electrical insulator.
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Superheterodyne receiver
A superheterodyne receiver, often shortened to superhet, is a type of radio receiver that uses frequency mixing to convert a received signal to a fixed intermediate frequency (IF) which can be more conveniently processed than the original carrier frequency.
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System of equations
In mathematics, a set of simultaneous equations, also known as a system of equations or an equation system, is a finite set of equations for which common solutions are sought.
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Tensor
In mathematics, tensors are geometric objects that describe linear relations between geometric vectors, scalars, and other tensors.
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Thermodynamic temperature
Thermodynamic temperature is the absolute measure of temperature and is one of the principal parameters of thermodynamics.
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Total angular momentum quantum number
In quantum mechanics, the total angular momentum quantum number parameterises the total angular momentum of a given particle, by combining its orbital angular momentum and its intrinsic angular momentum (i.e., its spin).
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Van der Waals force
In molecular physics, the van der Waals forces, named after Dutch scientist Johannes Diderik van der Waals, are distance-dependent interactions between atoms or molecules.
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Vibronic spectroscopy
Vibronic spectra involve simultaneous changes in the vibrational and electronic energy states of a molecule.
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Walter Gordy
Walter Gordy, (April 20, 1909 – October 6, 1985) was an American physicist best known for his experimental work in microwave spectroscopy.
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Waveguide
A waveguide is a structure that guides waves, such as electromagnetic waves or sound, with minimal loss of energy by restricting expansion to one dimension or two.
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Wavelength
In physics, the wavelength is the spatial period of a periodic wave—the distance over which the wave's shape repeats.
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Wavenumber
In the physical sciences, the wavenumber (also wave number or repetency) is the spatial frequency of a wave, measured in cycles per unit distance or radians per unit distance.
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William Klemperer
William A. Klemperer (October 6, 1927 – November 5, 2017) was an American chemist who was one of the most influential chemical physicists and molecular spectroscopists in the second half of the 20th century.
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Willis H. Flygare
Willis H. Flygare (July 24, 1936 – May 18, 1981) was an American physical chemist and professor at University of Illinois at Urbana–Champaign.
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World War II
World War II (often abbreviated to WWII or WW2), also known as the Second World War, was a global war that lasted from 1939 to 1945, although conflicts reflecting the ideological clash between what would become the Allied and Axis blocs began earlier.
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Zeeman effect
The Zeeman effect, named after the Dutch physicist Pieter Zeeman, is the effect of splitting a spectral line into several components in the presence of a static magnetic field.
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Zero-point energy
Zero-point energy (ZPE) or ground state energy is the lowest possible energy that a quantum mechanical system may have.
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References
[1] https://en.wikipedia.org/wiki/Rotational_spectroscopy
