Understanding Black Hole Radiation: The Mystery of Light Escaping Explained

AI Thread Summary
Light cannot escape from within a black hole's event horizon, which is a widely accepted principle in astrophysics. Radiation detected from black holes, such as gamma and radio waves, originates from outside the event horizon, particularly from the hot, ionized matter in the accretion disk. This matter emits radiation as it spirals toward the black hole but does not cross the event horizon. Hawking Radiation is often misunderstood; it involves negative energy entering the black hole while positive energy escapes, but it does not come from within the event horizon. Understanding these mechanisms clarifies the nature of radiation associated with black holes.
Petyab
Messages
20
Reaction score
0
Why is it generally acccepted that light can't escape from a black hole when gamma and radio wave radiation has been shown to be coming from them? A way I can think around this is that the expulsion happens before the event horizon and is some sort of rejection phenomenon that fuels a chain reaction. Sorry if that's crossing more into theory. Anybody got answers?
 
Science news on Phys.org
Yes, you are correct that the expulsion happens OUTSIDE the EH. NOTHING escapes from inside the EH.

Even Hawking Radiation, which is sometimes misunderstood as being something that radiates from inside the EH, does NOT involve anything coming OUT of the EH, but rather a negative energy dropping into the EH while an equivalent positive energy moves further away from the EH.
 
What Phinds said, plus you have to remember that accretion disks get very very hot, ionized, and emit lots of radiation when the matter is in the process of falling into the BH, but before it passes the event horizon.
 

Similar threads

I You can't actually enter a blackhole?
Replies
40
Views
3K
I Can Hawking Radiation Exist If Nothing Escapes a Black Hole?
Replies
4
Views
2K
I Can light be reflected in a black hole?
Replies
22
Views
1K
B Theories about light and time near a black hole
Replies
20
Views
2K
Hawking radiation , black hole size
Replies
15
Views
3K
I Escape from Two Black Holes? Solve the Mystery!
Replies
2
Views
2K
B Question about the Entropy of a Black Hole Singularity
Replies
17
Views
3K
B Can Particles Escape a Black Hole? The Hawking Radiation Improbability
Replies
3
Views
1K
B How does hawking radiation escape a black hole?
Replies
11
Views
2K
I How Does Hawking Radiation Lead to Black Hole Evaporation?
Replies
8
Views
2K

Hot Threads

Recent Insights

Back
Top