OT: Radios

[wdolson]

ORIGINAL: CRations

I was reading that light cannot escape a black hole. So the speed of gravitational pull can exceed the speed of light? Or does time just slow/stop in a black hole (thus slowing the speed of light - if that makes any sense)?

CR

The speed of light can change as it moves through different things. Light refracts through a crystal because of this. Diamond slow down light more than anything else, which is why diamonds have a special quality of sparkle no other gem has. Many other things slow down light too.

Gravity is an odd thing that we still don't completely understand. One of the Holy Grails in Physics is the Grand Unified theory that combines all the forces in the universe together in one simple equation. We've figured out how most of the forces work, but gravity is still one of those things we observe, but don't fully understand.

JWE pretty much explained how light behaves with a black hole.

Bill

[decaro]

ORIGINAL: wdolson

I don't believe we will ever be able to exceed the speed of light (the equations start getting imaginary numbers for one thing), but we may find a way around it as suggested by various SF authors like hyperspace, warp drive, or worm holes ...

My favorite is "folding space": it's so easy to demonstrate by punching holes with a pencil into a blank piece of paper.

[Blackhorse]

ORIGINAL: danlongman

Anybody remember James Blish's "Cities In Flight" series? Near the end of that an entire planet gets turned into a vehicle using its mass to achieve unthinkable (well somebody thought of it) speeds.
cheers

[raises hand] I do!

What city has two names twice?

. . . and don't mess with Omaha-Nevada; or was it Nebraska-Las Vegas?