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Some mirrors can reflect a lot more light even if in narrower wavelength ranges. But that only makes the matters worse from a practical human perspective, when

Some mirrors can reflect a lot more light even if in narrower wavelength ranges. But that only makes the matters worse from a practical human perspective, when trying to use them on large surfaces outside. It would feel like staring into the Sun far too often.

Arnt 6y ago
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 6y ago
  Lasers! :) I'm talking about dielectric mirrors. Wikipedia suggests 99.999% or better reflectivity over a narrow range of wavelengths.
  - Arnt 6y ago
    Of course. Duh.