(no subject)

[theweaselking]

Phil Plait speaks on Black Holes

Item #10 is especially awesome: Event horizon radius scales *linearly* with mass.

Comments

[iblis-kukl.livejournal.com]

[athelind.livejournal.com]

...which means that the radius scales to the cube root?

[theweaselking.livejournal.com]

I used the wrong word.

*radius* scales linearly with mass.

[nihil-duce.livejournal.com]

"spaghettification"......icky.

[jerril]

Volume for most things normally scales linearly with mass... so yeah. That's not a big surprise, is it?

[theweaselking.livejournal.com]

If I'd used the correct word, which is "radius" instead of "volume", it would be much more remarkable.

[jerril]

Woops, posts crossing in the toobs!

[jerril]

OK, so it turns out you fail at literacy :D

If you do the math carefully, you find that the event horizon grows linearly with the mass. In other words, if you double the black hole’s mass, the event horizon radius doubles as well.

So it's not the volume that scales linearly with mass, it's the RADIUS. Which IS peculiar. The VOLUME scales with the CUBE ROOT of mass.