# Tag Info

### Might the tiny Hawking radiation from our cosmic event horizon (CEH) be additive, since my CEH is not your CEH?

No, it is not additive. The reason is the origin of these sorts of effects. For simplicity, I'll treat our Universe as being exactly de Sitter. Firstly, I should notice that the thermal radiation on ...
• 9,801

### Does the event horizon always stay below you in the frame falling freely with you in a black hole?

There is no moving event horizon for a falling observer. It is still the case that this observer cannot receive information about events inside THE event horizon until they have also passed inside it. ...
• 113k
Accepted

### Calculating coordinate increase of light ray escaping black hole

What you are doing in the "dividing by $dv$" step is, rigorously, a part of imposing that the tangent $k^\mu$ to the photon's worldline is a null vector. If you want to do it in a "...
• 9,801