L_{e} = \frac{E_{e}}{Δ Ω_{2}} = \frac{1, 36 \times 10^{3}}{6 \times 10^{- 5}} = 2, 27 \times 10^{7} W m^{- 2} s r^{- 1}

${L_e = \frac{E_e}{\Delta \Omega_2} = \frac{1,36 \times 10^3}{6\times 10^{-5}} = 2,27 \times 10^7 \mathrm{W m^{-2} sr^{-1}}}$

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