mburns's Journal: Reconsider the Last Post.

This strong equivalence principle is stronger than I thought at first, if it actually constrains Hawking radiation to be only vertical to the horizon even to a nearby observer. Consider the side effects of nonvertical radiation that are visible or communicable to a distant observer - probably none.

Consider again the experience of a physically plausible observer that could possibly be communicated out to a distant post. That observer would report that a different location is inferred by her for the event horizon that she sees in front of her as she travels near light speed into the center. This horizon is arguably the current location of light that can still reach her before catastrophe at the center. This is a different horizon which can be closer in than that inferred at a distant post.

Now consider further that any observer could set an arbitrary criterion, an arbitrary deadline for arrival from an Unruh horizon. This brings into play a big relativity principle, maybe too big for an uncertainty principle. It seems, for example, that Unruh radiation is red shifted and dimmer to the sides - if not zeroed by a strong equivalence principle. But then the uncertainty principle would widen the beam.

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Michael J. Burns