info:eu-repo/semantics/article
The infalling photon, the infalling particle, and the observer at rest near the horizon of a black hole
Fecha
2020-11Registro en:
Mazzitelli, Francisco Diego; The infalling photon, the infalling particle, and the observer at rest near the horizon of a black hole; IOP Publishing; European Journal of Physics; 41; 6; 11-2020; 1-10
0143-0807
CONICET Digital
CONICET
Autor
Mazzitelli, Francisco Diego
Resumen
When a massive test particle or a photon fall radially into a black hole, their energy, as measured by a static observer located very close to the horizon, diverges. In introductory courses on general relativity, this fact gives rise to questions about the reality of this divergence and its eventual effect on the geometry of the black hole. We address these concerns and show that, eventually, it is the observer at rest who may induce corrections to the metric, unless its mass is crucially small when located near the horizon.