Physics Constants

NAME SYMBOL VALUE

Refractive Index of Water n_w 1.33

Rydberg Constant α²m_ec/2h R_∞
R_∞c
R_∞hc 10973731.568549(83) m^-1
3.289841960368(25) × 10¹⁵ Hz
2.17987190(17) × 10^-18 J

Sackur-Tetrode Constant S₀/R -1.1517048(44)
-1.1648678(44)

Second Radiation Constant hc/k c₂ 1.4387752(25) × 10^-2 m K

Shielded Proton Gyromagnetic Ratio 2µ_p/ħ (H₂O, sphere, 25°C) γ'_p
γ'_p/2π 2.67515341(11) × 10⁸ s^-1 T^-1
42.5763888(18) MHz T^-1

Shielded Proton Magnetic Moment (H₂O, sphere, 25°C) µ'_p
µ'_p/µ_B
µ'_p/µ_N 1.410570399(59) × 10^-26 J T^-1
1.520993132(16) × 10^-3
2.792775597(31)

Solar Constant 1400 W m^-2

Spectral Radiance, First Radiation Constant for 2hc² c_1L 1.191042722(93) × 10^-16 W m² sr^-1

Stefan-Boltzmann Constant (π²/60)k⁴/ħ³c2 σ 5.670400(40) × 10^-8 W m^-2 K^-4

Sun's Energy Production 3.90 × 10²⁶ W