Bounding the greybody factors for the Reissner-Nordstr\"{o}m black holes

Understand

A black hole can emit radiation called Hawking radiation.

• Such radiation seen by an observer outside the black hole differs from the original radiation near the horizon of the black hole by the so-called "greybody factor".
• In this paper, the bounds of the greybody factors for the Reissner-Nordstr\"{o}m black holes are obtained.
• These bounds can be derived by using the 2 x 2 transfer matrices.