On 08/03/2011 09:14 PM, Darren New wrote:
> Orchid XP v8 wrote:
>> I gather space actually has a slight negative curvature, so it
>> strictly isn't Euclidian...
>
> Well, it isn't uniformly curved, for sure.

Oh crud, I forgot about that... >_<

> Yes. But once you have a black hole, you can take away the pressure and
> the gravity will keep it "crushed". Indeed, "black hole" is the extent
> to which you have to "crush" some amount of matter before the gravity
> alone is enough to keep it "crushed". That's kind of the definition of a
> black hole.

Right, OK.

> OK, make a black hole that weighs 10x as much as the sun. Now drop 50
> more of our sun into it. Do you think the gravity will remain the same?

You make a persuasive argument, young man.

>>> The speed of light in a diamond is less than half the speed of light in
>>> free space/vacuum.
>>
>> Really? I didn't think it was such a big difference! o_O
>
> The index of refraction (IOR) is the ratio of the speed of light in
> vacuum to the speed of light in that material.

Sure. But I thought most things had an IOR of almost exactly 1...

-- 
http://blog.orphi.me.uk/
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