Greek Letters



Lowercase Capital Name Commonly Used in Physics
α Α alpha Alpha particle (He+2)
Angular acceleration
Linear expansion coefficient
β Β beta Beta particle (e-)
Sound intensity
γ Γ gamma Gamma ray
Ratio of heat capacities (ideal gas)
δ Δ delta Δ: change in
δ: infinitesimal change in
ε Ε epsilon Emissivity
Strain
ζ Ζ zeta
η Η eta Viscosity
θ Θ theta Angle (°, rad)
Temperature
ι Ι iota
κ Κ kappa Spring constant
λ Λ lambda Eigenvalue
Thermal conductivity constant
Wavelength
μ Μ mu Coefficient of friction
ν Ν nu Frequency
ξ Ξ xi Damping coefficient
ο Ο omicron
π Π pi 3.14159...
ρ Ρ rho Density (kg/m3)
σ Σ sigma Boltzmann constant
Stress
Sum
Uncertainty
τ Τ tau Any time constant
Tau particle (lepton)
Torque(N⋅m)
υ Υ upsilon
φ Φ phi Angle (°, rad)
Magnetic flux
χ Χ chi Rabi frequency (lasers)
ψ Ψ psi Wave function
ω Ω omega Ω: Ohms (electrical resistance)
ω: Angular velocity (rad/s)
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