| Symbol | Value | Relative Standard Uncertainty | |
|---|---|---|---|
| speed of light in vacuum | 299 792 458 m·s−1 | defined | |
| Newtonian constant of gravitation | 6.67428(67)×10−11 m3·kg−1·s−2 | 1.0 × 10−4 | |
| Planck constant | 6.626 068 96(33) × 10−34 J·s | 5.0 × 10−8 | |
| reduced Planck constant | 1.054 571 628(53) × 10−34 J·s | 5.0 × 10−8 |
| Symbol | Value | Relative Standard Uncertainty | |
|---|---|---|---|
| speed of light in vacuum | 299 792 458 m·s−1 | defined | |
| Newtonian constant of gravitation | 6.67428(67)×10−11 m3·kg−1·s−2 | 1.0 × 10−4 | |
| Planck constant | 6.626 068 96(33) × 10−34 J·s | 5.0 × 10−8 | |
| reduced Planck constant | 1.054 571 628(53) × 10−34 J·s | 5.0 × 10−8 |