Black Hole Evaporation

[SsDd]

The lecture video is embedded below.

Additionally, slides used in the lecture are embedded below, or can also be downloaded directly from here.

Questions after the lecture? Please feel free to post them in the same thread.

Click to play embedded YouTube video.

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[yakovina_ivan]

1.Why the particle, which falls in to a black hole might have negative (dark) enegry and repulsive gravitational force?
Why not quite the contrary?

2. How big is a black hole radius for a proton? quark?

[neufer]

1.Why the particle, which falls in to a black hole might have negative (dark) energy and repulsive gravitational force?
Why not quite the contrary?

No one has ever suggested that dark energy comes in the form of particles.

Dark energy is some sort tenuous quality of the current universe.

When, and if, dark energy becomes much more dense
it might be interesting to speculate about it's effect on black holes.

2. How big is a black hole radius for a proton? quark?

Comet Hartley 2 has a black hole Schwarzschild radius of about half a proton radius.

A flea's egg has a black hole Schwarzschild radius of about a Planck length.

It makes no sense to talk about black hole Schwarzschild radii that are smaller than that.

[yakovina_ivan]

1. As I understood from the lecture, the whole principle of evaporation is: near an event horizon a particle with a positive energy flees away and it's "negative partner" falls down. Don't they?

Quote: : "Falls in: dark energy, Bumped out: "normal" energy". end quote.

2. Thank you for the answer!

[jameshardy]

gees. I think I need to review my physics lessons first with this one.