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How is the Hanbury-Brown and Twiss effect used to measure the size of stars?

I understand what an Hanbury Brown and Twiss (HBT) interferometer does, but how can this be used to measure the apparent angular diameter of some object? What is the mathematical explaination?

asked Dec 6 '11 at 17:50

Dan
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How is the Hanbury-Brown and Twiss effect used to measure the size of stars?

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