Are physical objects necessarily burnt up by the blue sheet inside a black hole?

TL;DR

This paper investigates the impact of the blue sheet phenomenon inside Reissner-Nordstrom black holes on infalling objects, finding that the effects are finite and often negligible, challenging assumptions about destructive blue sheet effects.

Contribution

It provides a simplified model analysis showing that blue sheet effects are finite and typically negligible for classical electromagnetic fields inside charged black holes.

Findings

Blue sheet effects are finite for classical electromagnetic fields.

Infalling objects are often unaffected by the blue sheet.

Blue sheet effects are negligible for typical parameters.

Abstract

The electromagnetic radiation that falls into a Reissner-Nordstrom black hole develops a ``blue sheet'' of infinite energy density at the Cauchy horizon. We consider classical electromagnetic fields (that were produced during the collapse and then backscattered into the black hole), and investigate the blue-sheet effects of these fields on infalling objects within a simplified model. These effects are found to be finite and even negligible for typical parameters.