11 Jan '09 11:38

I see two formulae listed, one by A. Albo Michigan State, that goes

the angle of deflection of light going by a large mass as A= 4GM/C^2*R^2 and by others as A=4GM/C^2* R (Note, R NOT squared). I have tried contacting astronomers and 'ask the astronomer' and tried to send to A. Abdo but so far, 2 weeks later, no response. I am trying to do a paper for publication somewhere but till I get this cleared up, I am stymied, have two results to graph out, only one is correct. Thanks for looking at this. This is the formula that Einstein used to get the famous 1.75 arc seconds of deflection of light that put him on the map. What ticks me off about this is giving the angle in arc seconds instead of the right units, radians. That threw me off for a couple of years!

the angle of deflection of light going by a large mass as A= 4GM/C^2*R^2 and by others as A=4GM/C^2* R (Note, R NOT squared). I have tried contacting astronomers and 'ask the astronomer' and tried to send to A. Abdo but so far, 2 weeks later, no response. I am trying to do a paper for publication somewhere but till I get this cleared up, I am stymied, have two results to graph out, only one is correct. Thanks for looking at this. This is the formula that Einstein used to get the famous 1.75 arc seconds of deflection of light that put him on the map. What ticks me off about this is giving the angle in arc seconds instead of the right units, radians. That threw me off for a couple of years!