Why Do We Get an Einstein Cross Instead of a Skewed Ring?

Unredeemed · Sep 20, 2008

Why do we ever get Einstein crosses? I realize it is because the alignment is not right, but why do we get a cross because of this instead of just a skewed ring?

Thanks,
Jamie

George Jones · Sep 20, 2008

Unredeemed said:

Why do we ever get Einstein crosses? I realize it is because the alignment is not right, but why do we get a cross because of this instead of just a skewed ring?

Thanks,
Jamie

Hartle's book Gravity: An Introduction to Einstein's General Relativity has a nice treatment of this. I can look it up on Monday.

Unredeemed · Sep 21, 2008

George Jones said:

Hartle's book Gravity: An Introduction to Einstein's General Relativity has a nice treatment of this. I can look it up on Monday.

That would be great, thank you.

Why Do We Get an Einstein Cross Instead of a Skewed Ring?

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Why Do We Get an Einstein Cross Instead of a Skewed Ring?

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