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Phó͘-sè Tiāⁿ-sò͘ ê Pió[siu-kái]

Liōng Hû-hō Ti̍t Relative Standard Uncertainty
characteristic impedance of vacuum Z_0 = \mu_0 c \, 376.730 313 461... Ω Tēng-gī
electric constant (permittivity of free space) \epsilon_0 = 1 / ( \mu_0 c^2 )\, 8.854 187 817... × 10-12F·m-1 Tēng-gī
magnetic constant (permeability of free space)  \mu_0 \, 4π × 10-7 N·A-2 = 1.2566 370 614... × 10-6 N·A-2 Tēng-gī
Newtonian constant of gravitation G \, 6.6742(10) × 10-11m3·kg-1·s-2 1.5 × 10-4
Planck ê tiāⁿ-sò͘ h \, 6.626 0693(11) × 10-34 J·s 1.7 × 10-7
Dirac ê tiāⁿ-sò͘ \hbar = h / (2 \pi) 1.054 571 68(18) × 10-34 J·s 1.7 × 10-7
speed of light in vacuum c \, 299 792 458 m·s-1 Tēng-gī