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Hi all

The expression for the angle deflection on the following page: http://relativity.livingreviews.org/open?pubNo=lrr-1998-12&page=node2.html [Broken]

Is the impact parameter r in the expression the distance to the surface of the objects that deflects the light or the the center of mass of the object? Unfortunately they do not specify this.

The expression for the angle deflection on the following page: http://relativity.livingreviews.org/open?pubNo=lrr-1998-12&page=node2.html [Broken]

Is the impact parameter r in the expression the distance to the surface of the objects that deflects the light or the the center of mass of the object? Unfortunately they do not specify this.

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