Question: A magnetic-field technique for stabilizing a HeNe laser to 2 parts in 10 10 has been patented. At 632.8 nm, what would be the coherence

A magnetic-field technique for stabilizing a He–Ne laser to 2 parts in 10¹⁰has been patented. At 632.8 nm, what would be the coherence length of a laser with such a frequency stability?

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