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PeterDonis
#2
Mar4-12, 11:16 PM
Physics
Sci Advisor
PF Gold
P: 6,138
Quote Quote by pawprint View Post
I even began a thread- "Value of g near a black hole"
I assume the previous thread you are referring to is this one?

http://physicsforums.com/showthread.php?t=576973

If so, yes, the answer you were given is b), and it is the correct answer.

Quote Quote by pawprint View Post
I now believe my prior understanding (which is intuitive rather than mathematical) was flawed. I propose that gravity approaches infinity asymptotically at the singularity, not the EH.
Why do you think the answer you were given in the previous thread is wrong? If it's because of this...

Quote Quote by pawprint View Post
Can a purely Newtonian approach be used for calculations at discernable distances from the singularity?
...then it's not a valid reason, because the answer to the question just quoted is "no". A "purely Newtonian" approach will give incorrect answers unless you are at a radial coordinate r that is much, much larger than the Schwarzschild radius (2M), so that the error in the Newtonian formulas becomes too small to measure.