Relativity
Spacetime Interval
Invariant separation between two events in spacetime.
SI unit
metre (m)
Dimension:
Other units
- metre (m)
Order of magnitude
How values of spacetime interval span the physical world (in m, log scale).
Planck length
1.60 × 10-35 m
Observable universe
8.80 × 1026 m
Lower limit10-35 mUpper limit1026 m