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For the curious people, there are no practical refractive materials for x-rays, and mirror shapes have to be 4 times more accurate than equivalent refractive systems for the same diffraction limit.

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Can x-rays be waveguided with x-rays and/or other bands?

- "Shattering the 'copper or optics' paradigm: humble plastic waveguides outperform" https://news.ycombinator.com/item?id=39493372

- dual beam waveguiding with optics, NIRS + ultrasound: https://news.ycombinator.com/item?id=35617859

Do you know what the objective limits are with current mirrors? They just say that nanometer objectives are not possible with current mirrors, but no measure of SOTA

no, sorry, the friend who told me all that left the country.

Thanks anyways

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