Commonly Used Greek Letters in Subjects

                                                       
                                              Commonly Used Greek Letters in Subjects


Lower case


Capital


Name

\alpha\;\Alpha\;alphaAngular acceleration
Linear expansion
Coefficient
Alpha particle (helium nucleus)
Fine Structure Constant
\beta\;\Beta\;betaBeta particle — high energy electron
Sound intensity
\gamma\;\Gamma\;gammaGamma ray (high energy EM wave)
Ratio of heat capacities (in an ideal gas)
Relativistic correction factor
\delta\;\Delta\;deltaΔ="Change in"
δ="Infinitessimal change in"
\epsilon\;\Epsilon\;epsilonEmissivity
Strain
Permittivity
EMF
\zeta\;\Zeta\;zeta(no common use)
\eta\;\Eta\;etaViscosity
Energy efficiency
\theta\;\Theta\;thetaAngle (°, rad)
Temperature
\iota\;\Iota\;iotaThe lower case \iota\; is rarely used, while \Iota\; is sometimes used for the identity matrix or the moment of inertia. Note that \iota\; is not to be confused with the Roman character i; (which has a dot and is much more widely used in mathematics and physics).
\kappa\;\Kappa\;kappaSpring constant
Dielectric constant
\lambda\;\Lambda\;lambdaWavelength
Thermal conductivity
Constant
Eigenvalue of a matrix
Linear density
\mu\;\Mu\;muCoefficient of friction
Electrical mobility
Reduced mass
Permeability
\nu\;\Nu\;nuFrequency
\xi\;\Xi\;xiDamping cofficient
o\;O\;omicron(no common use)
\pi\;\Pi\;piProduct symbol Π
Circle number π: = 3.14159...
\rho\;\Rho\;rhoVolume density
Resistivity
\sigma\;\Sigma\;sigmaSum symbol
Boltzmann constant
Electrical conductivity
Uncertainty
Stress
Surface density
\tau\;\Tau\;tauTorque
Tau particle (a lepton)
Time constant
\upsilon\;\Upsilon\;upsilon(pending)
\phi\;\Phi\;phiMagnetic/electric flux
Angle (°, rad)
\chi\;\Chi\;chiRabi frequency (lasers)
Susceptibility
\psi\;\Psi\;psiWave function
\omega\;\Omega\;omegaOhms (unit of electrical resistance)
ω Angular velocity