Re: Tracking

Mark L. Fergerson wrote:

I keep seeing claims that Alcubierre doesn't violate either of the Relativities (isn't unphysical). That seems to imply that there actually _is_ a preferred frame, where all luxons (including gravitons, the quanta of the GraviProtational field) live.

Why do you think that?

I don't follow. Any form of Cerenkov must travel at c, otherwise we couldn't see it. This means that c is the "default" velocity of luxons, when they aren't traveling in some medium other than the New Improved Aether.

_All_ photons (and luxons) travel at c. That's the cornerstone of special relativity, and special relativity is incorporated into general relativity locally.

For all we know ordinary Cerenkov _does_ travel above c for a while immediately after emission, possibly some sort of "near field" effect? Hence _observable_ Cerenkov is only the "far field" part.

Photons always travel at exactly c (locally). Cherenkov radiation is just photons. If you're seriously suggesting that Cherenkov radiation travels faster than c for a time, then that violates special relativity, and Cherenkov radiation is already perfectly consistent with it.

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