Re: Speed of Radioactivity
From: EjP (nospam_at_hackers.are.bad)
Date: 07/20/04
- Next message: Douglas Eagleson: "Re: Why must force carriers have integer spin?"
- Previous message: Michael Varney: "Re: Innovative paper on "Interstellar Night Sky""
- In reply to: Francisco Diaz Jr.: "Re: Speed of Radioactivity"
- Messages sorted by: [ date ] [ thread ]
Date: Tue, 20 Jul 2004 11:52:15 -0500
Francisco Diaz Jr. wrote:
> EjP <nospam@hackers.are.bad> wrote in message news:<cdh4mn$g6p$1@info4.fnal.gov>...
>
>>Francisco Diaz Jr. wrote:
>>
>>
>>>Can the speed of radioactivity be measured,
>>
>>Yes.
>>
>>
>>>it beats the speed of light.
>>
>>Well, gamma rays *are* light, so they move at the speed of light.
>>
>>The speed of other types of radiation depends on the energy, but
>>for the common range of decay energies on the order of an MeV or so.
>>
>>Beta rays are electrons (or positrons)
>>which are typically moving a decent fraction of the speed of light
>>(>10%).
>>
>>Alpha rays (Helium nuclei) and neutrons typically move at a pretty
>>small fraction of the speed of light (order of a few %).
>>
>>-E
>
> Why does radioactive energy emit out of a black hole (creating bulges
> in the universe), where as regular light cannot pentrate into or out
> of the black hole?
What you're talking about is so-called "Hawking Radiation", which
is a fairly complex process, which has never actually been observed.
In theory, it occurs because of quantum uncertainty near the
event horizon of the black hole, so nothing "gets out" in the
sense that we usually think of it except energy. It's described here:
http://math.ucr.edu/home/baez/physics/Relativity/BlackHoles/hawking.html
but the details of the calculation are *extremely* complicated.
The actual radiation consists of ordinary photons, particles and
antiparticles, so nothing would be going faster than light.
-E
- Next message: Douglas Eagleson: "Re: Why must force carriers have integer spin?"
- Previous message: Michael Varney: "Re: Innovative paper on "Interstellar Night Sky""
- In reply to: Francisco Diaz Jr.: "Re: Speed of Radioactivity"
- Messages sorted by: [ date ] [ thread ]
Relevant Pages
|
|
