# Information Density of Spacetime [closed]

How much information is required to completely describe a given volume in spacetime?

• Depends on what's inside the volume. The limit is given by the Bekenstein bound. – psitae Jan 25 '19 at 16:42

If a system of total energy $$E$$, including rest masses, is enclosed in a sphere of radius $$R$$, then the entropy $$S$$ of the system is bounded by $$S \leq \lambda RE$$ where $$λ > 0$$ is a constant (the value $$λ = 2π$$ is often proposed).