Recent content by MetricBrian

Asking for the speed of light in a curved space sounds meaningless when you put it that way.

Thanks! That clears it up for me. Now back to the speed of light. Are you saying that the speed of light is same in SP and GR but the velocity can differ?

How are the velocities different?

That's very interesting. The only experimental evidence available is the local measurement of light speed. We can't meausure light speed in curved space. is that right?

is it possible that the effects of gravity on light could be mistaken... http://www.extinctionshift.com/SignificantFindings.htm

But I thought that if light is not constant, then relativity must be wrong.

O.K. Then it is absolutely correct to say that the speed of light is constant in GR?

What's the difference between speed and velocity?

How can it be constant and viewed as variant?

I've had a debate with someone recently about whether or not light is constant in GR. I think that it is. Is there any debate on this point?

that's fine, but it is determinstic insofar as an Event necessarily determines a result that must fall within a specifed range - if you replay the experiment, the result will always fall within the range. It's sort of a restricted casually determined relation

i'm a little confused. are we talking about the same thing? i think i mistyped. my question was really: why are people so sure that causes don't exist for apparently random behavior? is that the question you were answering?

I don't see why not. Why are people so sure that causes must not exist. I don't get it.

Certainly QM is deterministic in so far as an event determines a range of values that must fall within definite bounds. But even a purely determistic theory can have probable outcomes which would be the case where we didn't know enough about the system to predict with accuracy. In the...

Main Entry: de·ter·min·ism Pronunciation: \di-ˈtər-mə-ˌni-zəm, dē-\ Function: noun Date: 1846 1 a: a theory or doctrine that acts of the will, occurrences in nature, or social or psychological phenomena are causally determined by preceding events or natural laws