Bu̍t-lí tiāⁿ-sò͘

Phó͘-sè Tiāⁿ-sò͘ ê Pió

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