physics.owl
type: Ontology
description: This ontology covers classes and properties in the field of physics that are commonly used by astronomers. It includes terms from the IVOA Thesaurus plus terms from the UMD astronomical ontology
imports: IVOAO.owl
imports: units.owl
imports: instruments.owl
imports: skos-core.owl
imports: astronomy.owl
creator: Ed Shaya

ablation
type: Class
alt label: burn away
subclass of: erosion

absolute temperature scale
type: Class
subclass of: temperature scale

temperature scale
type: Class

absorption
type: Class

absorption coefficient
type: Class
alt label: absorptivity
subclass of: measurement

acceleration
type: Class
subclass of: measurement

acoustics
type: Class

acoustic wave
type: Class
alt label: sound
alt label: sound wave
subclass of: wave

adiabatic process
type: Class

adsorption
type: Class

albedo
type: Class
alt label: spherical albedo
alt label: reflectivity
subclass of: optical property

Alfven surface
type: Class

Alfven wave
type: Class
alt label: hydromagnetic wave
subclass of: magnetohydrodynamics

alpha particle
type: Class
subclass of: atomic nucleus
subclass of: boson
subclass of: nuclear radiation

angular momentum
type: Class
subclass of: measurement

angular velocity
type: Class
subclass of: velocity
subclass of: measurement

antimatter
type: Class
subclass of: matter

antineutrino
type: Class
subclass of: antiparticle

antiparticle
type: Class
subclass of: antimatter
subclass of: elementary particle

antinucleon
type: Class
subclass of: antiparticle

antiproton
type: Class
subclass of: antiparticle

atom
type: Class
subclass of: matter

matter
type: Class

atomic isotope
type: Class
subclass of: atom

atomic line
type: Class

atomic nucleus
type: Class
subclass of: subatomic particle
definition: nuclei [atoms]
related: proton
related: neutron

neutron
type: Class
subclass of: fundamental particle

atomic physics
type: Class
subclass of: scientificField

atomic process
type: Class

axion
type: Class
subclass of: elementary particle

baryon
type: Class
subclass of: elementary particle

elementary particle
type: Class
subclass of: subatomic particle

black body radiation
type: Class
alt label: thermal black body radiation
subclass of: electromagnetic radiation

Bose-Einstein Condensate
type: Class
subclass of: stateOfMatter

Bose-Einstein statistics
type: Class

boson
type: Class
subclass of: elementary particle

bottom quark
type: Class
subclass of: quark

boundary layer
type: Class

bound-free transition
type: Class
alt label: bound free transition

bow shock
type: Class
subclass of: shock wave

shock wave
type: Class

bremsstrahlung
type: Class
alt label: free free transition
alt label: free-free transition
subclass of: electromagnetic radiation

brillouin scattering
type: Class

brillouin spectrum
type: Class
subclass of: spectrum

caustic
type: Class

caustic crossing
type: Class

celsius temperature scale
type: Class
subclass of: temperature scale

center of mass
type: Class
subclass of: orbitalElement
subclass of: measurement

centigrade
type: Class
subclass of: temperature scale
definition: The most common temperature scale for scientific work. The freezing point of water is 0 degrees and the boiling point of water is 100 degrees in this system.

centrifugal force
type: Class
subclass of: force

centripetal force
type: Class
subclass of: force

force
type: Class

Cerenkov radiation
type: Class
alt label: Cerenkov effect
subclass of: electromagnetic radiation
subclass of: radiation

Chandrasekhar-Schoenberg limit
type: Class
alt label: Chandrasekhar-Schonberg limit
alt label: Schonberg-Chandrasekhar limit
alt label: Schoenberg-Chandrasekhar limit
subclass of: mass

mass
type: Class
subclass of: measurement

charm quark
type: Class
subclass of: quark

circular polarization
type: Class
alt label: circular polarisation UK
subclass of: light polarization
subclass of: measurement

cluster
type: Class

coherence
type: Class

collision
type: Class
alt label: collision process

collisional excitation
type: Class
subclass of: collision process

collisional plasma
type: Class
subclass of: plasma

plasma
type: Class
alt label: cosmic plasma
subclass of: stateOfMatter

collision broadening
type: Class
subclass of: collision process
subclass of: lineBroadening

collision process
type: Class
alt label: collisional process

collision strength
type: Class
subclass of: measurement

Compton effect
type: Class

Compton scattering
type: Class
subclass of: light scattering
subclass of: radiation scattering
subclass of: scattering

light scattering
type: Class
subclass of: scattering
subclass of: radiation scattering

radiation scattering
type: Class
alt label: electromagnetic wave scattering

scattering
type: Class

Compton wavelength
type: Class
subclass of: length

condensation
type: Class

conductanceQuantum
type: Class
subclass of: conductance
subclass of: electromagneticConstant
definition: conductance quantum is the quantized unit of conductance. It is defined by \frac{2e^2}{h}

conduction
type: Class

convection
type: Class

cooling
type: Class

current
type: Class
subclass of: measurement

current sheet
type: Class

cyclotron radiation
type: Class
subclass of: synchrotron radiation

damping constant
type: Class
subclass of: measurement

deceleration
type: Class
subclass of: measurement

degenerate matter
type: Class
subclass of: matter
subclass of: stateOfMatter

density
type: Class
alt label: specific gravity
subclass of: measurement

differential rotation
type: Class
subclass of: rotation

rotation
type: Class

diffraction
type: Class

diffraction patterns
type: Class

diffusion
type: Class
subclass of: measurement

dimension
type: Class

dipole
type: Class

dipole strength
type: Class
subclass of: measurement

dispersion
type: Class

dissipation
type: Class

Doppler broadening
type: Class
subclass of: lineBroadening

Doppler effect
type: Class

top quark
type: Class
subclass of: quark

drift wave
type: Class
subclass of: wave

dynamical time
type: Class
subclass of: time

dynamics
type: Class

dynamo theory
type: Class

Einstein coefficient
type: Class
subclass of: measurement

Einstein effect
type: Class
alt label: Einstein shift

elasticity
type: Class
subclass of: measurement

electrical property
type: Class
subclass of: measurement

electric charge
type: Class
alt label: electric constant

electric current
type: Class
subclass of: measurement

electric dipole
type: Class

electric dipole strength
type: Class
subclass of: electrical property

electric field
type: Class

electricity
type: Class

electrodynamics
type: Class

electromagnetic
type: Class

electron
type: Class
subclass of: nuclear radiation
subclass of: lepton

electron
type: Class
subclass of: nuclear radiation
subclass of: neutrino

electron beam
type: Class

electron density
type: Class
subclass of: density

electron gyromagnetic ratio
type: Class
subclass of: gyromagnetic ratio
subclass of: measurement

electronic state
type: Class

electronic transition
type: Class

electron magnetic moment
type: Class
subclass of: magnetic moment
subclass of: measurement

electron pumping
type: Class

electron temperature
type: Class
subclass of: temperature

electrostatic wave
type: Class

elementary particle scattering
type: Class
subclass of: scattering

electromagnetic field
type: Class
subclass of: radiation mechanism
subclass of: measurement

electromagnetic field
type: Class
subclass of: radiation mechanism
subclass of: measurement

emerging flux
type: Class
subclass of: magnetic field
subclass of: measurement

electromagnetic field
type: Class

electromagnetic force
type: Class
subclass of: force

electromagnetic interaction
type: Class
subclass of: radiation mechanism
subclass of: interaction

emission
type: Class

emission coefficient
type: Class
subclass of: measurement

emissivity
type: Class
subclass of: measurement

electromagnetic radiation
type: Class
alt label: electromagnetic wave
subclass of: radiation
subclass of: wave

radiation
type: Class

electromagnetic theory
type: Class

energetic particle
type: Class

energy
type: Class

energy content
type: Class

energy density
type: Class
subclass of: density

energy distribution
type: Class
subclass of: measurement

energy level
type: Class

energy source
type: Class

energy spectrum
type: Class

energy-transfer
type: Class
alt label: energy transfer

enthalpy
type: Class

entropy
type: Class

e-process
type: Class

equation of state
type: Class

equilibrium figure
type: Class

equipotential surface
type: Class

escape velocity
type: Class
subclass of: velocity

evaporation
type: Class

excitation
type: Class

extreme ultraviolet radiation
type: Class
alt label: EUV
subclass of: ultraviolet radiation

Faraday effect
type: Class
subclass of: magnetoOpticalEffect

far infrared radiation
type: Class
subclass of: infrared radiation

far ultraviolet radiation
type: Class
alt label: FUV
subclass of: ultraviolet radiation

ultraviolet radiation
type: Class
alt label: ultraviolet_light
subclass of: radiation
subclass of: electromagnetic radiation

Fermi interaction
type: Class
subclass of: weak interaction

fermion
type: Class
subclass of: elementary particle
subclass of: matter

Fermionic Condensate
type: Class
alt label: Fermi Dirac nucleus
subclass of: stateOfMatter

Feynman diagram
type: Class

Feynman integral
type: Class

field equation
type: Class

field of optics
type: Class
subclass of: physics

fine structure
type: Class

fission
type: Class

flow instability
type: Class

fluid dynamics
type: Class
subclass of: fluid mechanics

fluid mechanics
type: Class
subclass of: scientificField

fluorescence
type: Class

flux
type: Class
subclass of: measurement

flux density
type: Class
subclass of: measurement

focal length
type: Class
subclass of: measurement

Fokker-Planck equation
type: Class
alt label: Fokker Planck equation

forbidden transition
type: Class

free-bound emission
type: Class
alt label: free bound emission
subclass of: emissionSpectrum
subclass of: radiation mechanism

radiation mechanism
type: Class

free-free emission
type: Class
alt label: free free emission
subclass of: emissionSpectrum
subclass of: radiation mechanism

friction
type: Class

fundamental frequency
type: Class
subclass of: frequency
definition: The lowest characteristic frequency of oscillation of a dynamical system.

fundamental mode
type: Class
subclass of: pulsation mode

fundamental particle
type: Class
subclass of: elementary particle

fusion
type: Class

future light cone
type: Class
subclass of: light cone

gamma-ray radiation
type: Class
alt label: gamma-ray
alt label: gamma radiation
subclass of: high-energy radiation
subclass of: electromagnetic radiation
subclass of: nuclear radiation
subclass of: radiation

gamma-ray scattering
type: Class
alt label: gamma ray scattering
subclass of: scattering

gamma-ray spectrum
type: Class
alt label: gamma ray spectrum
subclass of: spectrum

gas distribution
type: Class

gas dynamics
type: Class
alt label: gas kinematics
subclass of: fluid dynamics

gaseous disk
type: Class
subclass of: disk

gaseous sphere
type: Class

general theory of relativity
type: Class
subclass of: relativity
subclass of: gravitation

g-factor
type: Class

gluon
type: Class
subclass of: fundamental particle
subclass of: boson

gravitating disk
type: Class
subclass of: disk

gravitation
type: Class

gravitational constant
type: Class
subclass of: physical constant

gravitational effect
type: Class

gravitational energy
type: Class
subclass of: energy

gravitational field
type: Class
alt label: gravity field

gravitational force
type: Class
alt label: force of gravity
subclass of: force

gravitational redshift
type: Class
subclass of: redshift

gravitational wave
type: Class
subclass of: wave

graviton
type: Class
subclass of: fundamental particle

gravity
type: Class
alt label: acceleration of gravity

gravity wave
type: Class
subclass of: wave

gyromagnetic ratio
type: Class

gyrosynchrotron radiation
type: Class
subclass of: synchrotron radiation

hadron
type: Class
subclass of: elementary particle

hadron barrier
type: Class

half-wave dipole
type: Class
alt label: half wave dipole
alt label: halfwave dipole
subclass of: dipole

Hanle effect
type: Class
definition: The Hanle Effect describes resonant line scattering polarization in a magnetic medium.

harmonic frequency
type: Class
alt label: harmonic overtones
alt label: harmonics
subclass of: frequency

Hawking radiation
type: Class

heat-transfer
type: Class
subclass of: energy-transfer

high-energy radiation
type: Class
alt label: high energy radiation
subclass of: radiation

high-temperature
type: Class
alt label: hot
alt label: high temperature

hydrodynamics
type: Class
subclass of: fluid dynamics

hydrostatic equilibrium
type: Class

infrared
type: Class

infrared emission
type: Class
subclass of: emissionSpectrum

infrared radiation
type: Class
subclass of: electromagnetic radiation
subclass of: radiation

intensity
type: Class
alt label: specific intensity

interference wave
type: Class

internal motion
type: Class
subclass of: motion

inverse Compton effect
type: Class

inverse Compton scattering
type: Class

inverse maser
type: Class

ionizing shock wave
type: Class
subclass of: shock wave

ion plasma wave
type: Class

irradiance
type: Class

isothermal sphere
type: Class
subclass of: mass distribution

mass distribution
type: Class

Jeans length
type: Class

Jeans mass
type: Class

jump condition
type: Class

kinematics
type: Class

kinetic energy
type: Class
subclass of: energy

lepton
type: Class
subclass of: fundamental particle
subclass of: fermion

light absorption
type: Class
subclass of: absorption

light coherence
type: Class
subclass of: coherence

light cone
type: Class

light emission
type: Class
subclass of: electromagnetic field

light interference
type: Class
subclass of: interference wave

light polarization
type: Class
alt label: polarization wave

line shift
type: Class
alt label: spectral line shift

local thermodynamic equilibrium
type: Class
alt label: LTE
subclass of: thermodynamic equilibrium

low-temperature plasma
type: Class
subclass of: plasma

luminescence
type: Class
alt label: candoluminescence

luminosity
type: Class

macroturbulence
type: Class
subclass of: turbulence

magnetic dipole strength
type: Class
subclass of: magnetic property

magnetic field
type: Class

magnetic moment
type: Class

magnetic moment anomaly
type: Class

magnetic monopole
type: Class

magnetic pole
type: Class

magnetic property
type: Class
subclass of: property

magnetohydrodynamics
type: Class
alt label: MHD
alt label: hydromagnetics

maser
type: Class

mass density
type: Class
subclass of: density

meson
type: Class
subclass of: boson

microwave
type: Class

microwave emission
type: Class
subclass of: emissionSpectrum

microwave radiation
type: Class
subclass of: electromagnetic radiation

microwave spectrum
type: Class
subclass of: spectrum

Mie scattering
type: Class
subclass of: scattering

millimeter radiation
type: Class
alt label: millimeter wave
alt label: mm radiation
subclass of: electromagnetic radiation

MOdified Newtonian Dynamics
type: Class
alt label: MOND
subclass of: gravitation

momentum
type: Class

motion
type: Class

muon
type: Class
subclass of: lepton

muon neutrino
type: Class
subclass of: neutrino

naked singularity
type: Class
subclass of: singularity

singularity
type: Class

near infrared radiation
type: Class
subclass of: infrared radiation

near ultraviolet radiation
type: Class
alt label: NUV
subclass of: ultraviolet radiation

neutral gas
type: Class
subclass of: gas

neutrino
type: Class
subclass of: lepton

Newtonian gravitation
type: Class
subclass of: gravitation

non-equilibrium flow
type: Class
alt label: nonequilibrium flow
subclass of: flow

non-radial pulsation
type: Class
alt label: nonradial pulsation

non-thermal radiation
type: Class
alt label: nonthermal radiation

nuclear fission
type: Class
subclass of: fission
subclass of: nuclear reaction

nuclear fusion
type: Class
subclass of: fusion
subclass of: nuclear reaction

nuclear physics
type: Class

nuclear radiation
type: Class

nuclear reaction
type: Class

nutation
type: Class

oblique rotator
type: Class

opacity
type: Class
subclass of: optical property

optical radiation
type: Class
subclass of: electromagnetic radiation

optical pathlength
type: Class

optical property
type: Class
subclass of: property
subclass of: measurement

oscillation
type: Class

oscillator strength
type: Class
alt label: f value
alt label: f-value

overtone frequency
type: Class
alt label: harmonic overtones
alt label: overtones
subclass of: frequency

overtone mode
type: Class
alt label: overtones
subclass of: pulsation mode

pair annihilation
type: Class

pair production
type: Class
subclass of: particle production

particle production
type: Class

particle
type: Class

particle acceleration
type: Class

particle accretion
type: Class

particle beam
type: Class

particle creation
type: Class

particle density
type: Class
subclass of: density

particle interaction
type: Class

particle mass
type: Class
subclass of: mass

Paschen-Back effect
type: Class
subclass of: magnetoOpticalEffect
definition: the Paschen-Back effect is the splitting of atomic energy levels in the presence of a strong magnetic field. This occurs when an external magnetic field is sufficiently large to disrupt the coupling between orbital and spin angular momenta. This effect is the strong field generalization of the Zeeman effect.

past light cone
type: Class
subclass of: light cone

p branch
type: Class
subclass of: molecularSpectrum
definition: A set of lines in the spectra of molecules corresponding to unit increases in rotational energy.

Penrose process
type: Class

phase space
type: Class

phosphorescence
type: Class

photon
type: Class
subclass of: fundamental particle
subclass of: boson

physical constant
type: Class
alt label: fundamental constant
subclass of: constant
subclass of: unit

physical distance
type: Class
subclass of: measurement
subclass of: distance

pion
type: Class
subclass of: boson

pixel
type: Class
alt label: picture element
alt label: voxel

Planck black body formula
type: Class

Planck constant
type: Class
subclass of: physical constant

plane polarization
type: Class
alt label: linear polarization
alt label: plane polarisation UK
subclass of: light polarization

plasma loop
type: Class

plasma physics
type: Class

plasma wave
type: Class

Poincare theorem
type: Class

polarization charge separation
type: Class
subclass of: magnetoOpticalEffect

polarized light
type: Class
alt label: polarized radiation
alt label: polarised light UK
subclass of: electromagnetic radiation

polytrope
type: Class

population inversion
type: Class

positron
type: Class
subclass of: antiparticle
subclass of: lepton
subclass of: nuclear radiation

potential energy
type: Class
subclass of: energy

potential theory
type: Class

power
type: Class

Poynting-Robertson effect
type: Class
alt label: Poynting Robertson effect

p process
type: Class

precession
type: Class
subclass of: measurement

precursor pulse
type: Class

pressure
type: Class
subclass of: measurement

pressure broadening
type: Class
subclass of: lineBroadening

proton
type: Class
subclass of: boson

pulsation mode
type: Class

pulse
type: Class

pulse duration
type: Class

pulse energy
type: Class

pulse intensity
type: Class

pulse profile
type: Class

pulse structure
type: Class

pulse width
type: Class

pulse window
type: Class

q branch
type: Class

quanta
type: Class
alt label: quantum

quantization
type: Class
alt label: quantisation UK

quantum field theory
type: Class

quantum mechanics
type: Class

quantum theory
type: Class

quark
type: Class
subclass of: fundamental particle

radial pulsation
type: Class

radial velocity
type: Class
subclass of: velocity

velocity
type: Class
subclass of: measurement

radiation damping
type: Class

radiation field
type: Class

radiation measurement
type: Class
subclass of: measurement

radiation pressure
type: Class

radiative equilibrium
type: Class

radiative recombination
type: Class
alt label: radiative capture

radiative transfer
type: Class
subclass of: energy-transfer

radio absorption
type: Class

radioactive decay
type: Class

radioactivity
type: Class

radio emission
type: Class
subclass of: emissionSpectrum

radio frequency
type: Class
subclass of: frequency

radio radiation
type: Class
alt label: radio wave
subclass of: electromagnetic radiation

radio recombination line
type: Class
subclass of: recombinationLine

radio spectrum
type: Class
subclass of: spectrum

Raman scattering
type: Class

Rankine-Hugoniot relation
type: Class

Rayleigh
type: Class

Rayleigh criterion
type: Class
alt label: Rayleigh limit

Rayleigh limit
type: Class

Rayleigh number
type: Class

Rayleigh scattering
type: Class
subclass of: radiation scattering
subclass of: light scattering

Rayleigh-Taylor instability
type: Class
subclass of: instability

Razin effect
type: Class
definition: The presence of a thermal plasma in the emitting region means that the refractive index of the medium is less than unity and the phase velocity of electromagnetic waves is greater than $c$. As a result, synchrotron radiation is suppressed at frequencies where the refractive index becomes significantly less than 1. This is often called Tsytovich-Razin effect. The consequence is a low-frequency cutoff near \begin{displaymath} \rm { {\nu_{R}} = {{4 c n e} \over {3 B_{\bot}}} = {{2\nu_{p... ... \nu_{0}}} \sim {{2 \times 10^{-5} n} \over {B_{\bot}}} MHz} \end{displaymath}

reference frame
type: Class

refraction
type: Class

refraction angle
type: Class
alt label: angle of refraction

refractive index
type: Class
subclass of: optical property

relativistic effect
type: Class

relativistic electron
type: Class
subclass of: electron
subclass of: relativistic particle

relativistic particle
type: Class
subclass of: elementary particle

relativistic fluid dynamics
type: Class
subclass of: fluid dynamics
subclass of: relativistic mechanics

relativistic mechanics
type: Class

relativistic plasma
type: Class
alt label: relativistic gas
subclass of: gas
subclass of: plasma

relativistic velocity
type: Class
subclass of: velocity

relativity
type: Class

retardation
type: Class

rigid body rotation
type: Class
subclass of: rotation

rotating body
type: Class

rotating shell
type: Class
subclass of: shell

rotational velocity
type: Class
subclass of: velocity

Schwarzschild metric
type: Class

Schwarzschild radius
type: Class
subclass of: radius

scintillation
type: Class

self-absorption
type: Class
alt label: self absorption

shock
type: Class

sound speed
type: Class
alt label: speed of sound

space-time curvature
type: Class

space-time singularity
type: Class
subclass of: singularity

special theory of relativity
type: Class
subclass of: general theory of relativity

spectrum
type: Class

s-process
type: Class
alt label: s process

Stark broadening
type: Class
subclass of: lineBroadening

stimulated emission
type: Class

stimulated radiation
type: Class

stokes parameter
type: Class

strange quark
type: Class
subclass of: quark

strong interaction
type: Class
subclass of: interaction

subatomic particle
type: Class

submillimeter radiation
type: Class
alt label: submillimeter wave
subclass of: electromagnetic radiation

symmetry breaking
type: Class

synchrotron radiation
type: Class
subclass of: radiation
subclass of: electromagnetic radiation

physical system
type: Class

physical system
type: Class
subclass of: measurement

tangential velocity
type: Class
subclass of: velocity

tau particle
type: Class
subclass of: lepton

tau neutrino particle
type: Class
subclass of: neutrino

temperature
type: Class
subclass of: measurement

temperature fluctuation
type: Class

thermal conductivity
type: Class

thermal emission
type: Class
subclass of: emissionSpectrum

thermal equilibrium
type: Class

thermal instability
type: Class

thermal property
type: Class
subclass of: property

thermal radiation
type: Class
subclass of: electromagnetic radiation
subclass of: radiation

thermal stability
type: Class

thermal structure
type: Class

thermionic emission
type: Class
alt label: dark current

thermodynamic equilibrium
type: Class

thermodynamics
type: Class

thermoluminescence
type: Class
subclass of: luminescence

thermonuclear reaction
type: Class

Thomson scattering
type: Class
subclass of: Compton scattering
subclass of: light scattering
subclass of: radiation scattering

three-body problem
type: Class
alt label: three body problem

three-dimensional spectrum
type: Class
alt label: three dimensional spectrum
subclass of: spectrum

top quark
type: Class
subclass of: quark

transition probability
type: Class

transmission
type: Class

transparency
type: Class

transport process
type: Class

two-dimensional spectrum
type: Class
alt label: two dimensional spectrum
subclass of: spectrum

ultraviolet
type: Class
alt label: UV

up quark
type: Class
subclass of: quark

vacuum
type: Class

velocity dispersion
type: Class

velocity distribution
type: Class

velocity ellipsoid
type: Class

velocity field
type: Class

velocity of light
type: Class
alt label: speed of light
subclass of: physical constant
subclass of: velocity

velocity space
type: Class

vibration
type: Class

vibrational spectrum
type: Class
subclass of: spectrum

virial theorem
type: Class

viscosity
type: Class

visible radiation
type: Class
alt label: light
subclass of: electromagnetic radiation

visible spectrum
type: Class
subclass of: spectrum

waveform analysis
type: Class

wavelength
type: Class

wave measurement
type: Class
subclass of: measurement

wave motion
type: Class
subclass of: motion

wave propagation
type: Class

weak gauge boson
type: Class
subclass of: fundamental particle
subclass of: boson

weak interaction
type: Class
subclass of: interaction

W-
type: Class
subclass of: fundamental particle
subclass of: weak gauge boson

W+
type: Class
subclass of: fundamental particle
subclass of: weak gauge boson

X-ray absorption
type: Class
subclass of: X-ray spectrum

X-ray diffraction
type: Class
subclass of: diffraction

X-ray emission
type: Class
subclass of: X-ray spectrum
subclass of: emissionSpectrum
subclass of: measurement

X-ray fluorescence
type: Class
subclass of: fluorescence
subclass of: photoluminescence

X-ray polarization
type: Class
subclass of: light polarization

X-ray radiation
type: Class
alt label: X-ray
subclass of: electromagnetic radiation
subclass of: radiation
subclass of: high-energy radiation

X-ray scattering
type: Class
subclass of: radiation scattering

X-ray spectroscopy
type: Class
subclass of: spectroscopy

X-ray spectrum
type: Class

Zeeman splitting
type: Class
alt label: spectral line splitting
alt label: line splitting
subclass of: magnetoOpticalEffect

Z0
type: Class
subclass of: fundamental particle
subclass of: weak gauge boson

wrt
type: ObjectProperty
domain: velocity
comment: With Respect To. Velocity is a motion with respect to some other Thing.

hasAtomicNumber
type: FunctionalProperty
comment: Number of Protons
range: int
domain: atom
type: DatatypeProperty

hasWaveMeasurement
type: FunctionalProperty
range: wave measurement
type: ObjectProperty
comment: This allows giving a frequency, wavelength or Energy for the reference Amplitude.
domain: wave

orbitalAngularMomentum
type: FunctionalProperty
type: DatatypeProperty
range: DataRange
  one of: s
  one of: p
  one of: d
  one of: f
domain: electronic state

quantumNumberL
type: FunctionalProperty
domain: atomicElectronicState
type: DatatypeProperty
range: DataRange
  one of: F
  one of: D
  one of: P
  one of: S

Kelvin
type: absoluteTemperatureScale

Fahrenheit
type: temperatureScale
comment: Temperature scale used for ordinary purposes in the United State Conversion from Centigrade is Centigrade*9/5 + 32.

Celsius
type: temperatureScale