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General Relativity - Deflection of light
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[QUOTE="TSny, post: 4996572, member: 229090"] I'm not knowledgeable in this field, but I will just make a comment. The metric you are working with is an example of a "conformally flat" metric. In general, such a metric can be written in the form ##g_{\mu \nu} = f \eta_{\mu \nu}## where ##\eta_{\mu \nu}## is the Minkowski (flat) metric and ##f## is a positive function defined on the space-time manifold. It can be shown that there is no bending of light for a conformally flat metric. This is not too surprising if you note that any null direction for the flat metric ##\eta_{\mu \nu}## is automatically a null direction for the metric ##g_{\mu \nu}## and vice versa. [/QUOTE]
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General Relativity - Deflection of light
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