<p>A black hole's gravity prevents light from escaping, how can a black hole emit X-rays? Visible light and X-rays are both electromagnetic radiation, shouldn't the black hole's gravity prevent X-rays from escaping?</p>

<p>What about <a href="https://en.wikipedia.org/wiki/Hawking_radiation" rel="nofollow noreferrer">Hawking radiation</a>  that is predicted to be released by <a href="https://en.wikipedia.org/wiki/Black_hole" rel="nofollow noreferrer">black holes</a>.</p>

CC BY-SA 3.0
2017-01-11T17:33:58.140Z
@JamesK No my question is different.
Harsh Kumar
CC BY-SA 3.0
2017-01-11T17:40:12.750Z
Please edit to clarify how it is different.  That question asks "How can a supermassive black hole be able to pull matter, but not the light photons of the energy?"
James K
CC BY-SA 3.0
2017-01-11T17:42:42.967Z
@Astrodude Both X-rays and Hawking radiation are phenomena that occur outside of the event horizon, so they can of course move away from the black hole.
called2voyage
<black-hole><gravity><hawking-radiation><x-ray>
How can X-rays be emitted from a black hole?
Harsh Kumar
# How can X-rays be emitted from a black hole?

(Asked by: username_0 on 2017-01-11)

A black hole's gravity prevents light from escaping, how can a black hole emit X-rays? Visible light and X-rays are both electromagnetic radiation, shouldn't the black hole's gravity prevent X-rays from escaping?

What about [Hawking radiation](https://en.wikipedia.org/wiki/Hawking_radiation) that is predicted to be released by [black holes](https://en.wikipedia.org/wiki/Black_hole).

**Tags:** black-hole, gravity, hawking-radiation, x-ray
> **Comments:**
> **username_0**: @JamesK No my question is different.  
> **username_1**: Please edit to clarify how it is different.  That question asks "How can a supermassive black hole be able to pull matter, but not the light photons of the energy?"  
> **username_2**: @Astrodude Both X-rays and Hawking radiation are phenomena that occur outside of the event horizon, so they can of course move away from the black hole.  

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