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Posted by Bruce on October 2, 2001 03:53:41 UTC

before you start looking for flaws. Alex cleared it up. Here is an example of the equivalence principle where all the local physics is done using SR. From special relativity

E = m/(1-v^2)^1/2 [where m = the mass of an object (in meters {geometric units}) at rest, at infinity in flat spacetime]

v^2 = 2M/r [where M is the mass of a spherically symmetric object in meters]

So for the Schwarzchild geometry we can write the energy equation

Eshell = E/(1-2M/r)^1/2

What will be the measured energy of a laser pulse received at Eshellr2 sent from Eshellr1

Eshellr1(1-2M/r1)^1/2 = E = Eshellr2(1-2M/r2)^1/2

Eshellr2 = [Eshellr1(1-2M/r1)^1/2]/(1-2M/r2)^1/2

Substitute 2M for r1 in 2M/r1 and you get the general relativistic solution for 'nothing, not even light can escape the event horizon'.

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