Which mirrors are that, and why are they made, what are they used for? Just gian... | Hacker News

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Arnt on April 16, 2021 | parent | context | favorite | on: 'Whitest ever' paint reflects 98% of sunlight

Which mirrors are that, and why are they made, what are they used for? Just giant telescopes on remote mountaintops, or is there more?

buran77 on April 16, 2021 [–]

Lasers! :)

I'm talking about dielectric mirrors. Wikipedia suggests 99.999% or better reflectivity over a narrow range of wavelengths.

Arnt on April 16, 2021 | [–]

Of course. Duh.

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