pub const PLANCK_LENGTH: Real = 1.616255e-35;Expand description
Planck length ℓ_Pl in meters (standard value).
This is raised to the fourth power to form the dimensionless curvature
parameter x = ℓ_Pl⁴ × 𝒦 inside the master Lagrangian. The term only
affects the proper-time rate at extreme (Planckian) curvatures.
See the relativistic timing model.