Figure 9. Schematic representation of the relationships between the photon radius (pH, dashed lines) and the “true” outer negative radius R-(left) respective inner positive radius R+ belonging to their distinct spaces

From

The Intrinsic Derivation of the Hubble Constant H in Cosmology

T. G. M. Gerlitz

International Journal of Physics. 2024, 12(4), 147-163 doi:10.12691/ijp-12-4-3