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## Physical constants

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e = 1,6021917 10 ^{-19} [C] (Coulomb)

m_{e} = 9,109558 10 ^{-31} [kg] (kilogram)

ε_{0} = 8,854 10 ^{-12} [F m ^{-1}] (Farad divided by meters)

c = 2,997925 10 ^{8} [m s ^{-1}] (a meter divided by one seconds)

I_{0} = 4,58 10 ^{-6} [J m ^{-3 }] (Joules divided by cubic meter) - calculated from solar constant

I_{m} = 4,210 ^{-14} [J m ^{-3 }] Background radiation energy density

G = 6,67 10 ^{-11} [m^{3} kg ^{-1} s ^{-2}] (cubic meters divided by kilograms and the square of a second)

N_{A} = 6,022 10 ^{23} - Avogadro's number - number of atoms in one mole of a member

Π = 3,141592654

### Uncompressed terms, labels

Energy of a photon

(1/2 + 1) corresponds (½ + 1)hν = ^{3}⁄_{2} hν

where:

h - Planck's constant

h = 6,626 10^{-34} J·s (Joule × second)

ν = frequency in s ^{-1}