It would not be possible to let IR radiation through though; a plasma mirror reflects everything below the critical frequency.Of course, as soon as the plasma generator or the magnetic stabilization are turned off, or disrupted, the mirror would dissolve almost instantly.A possible use case would be if the star was really luminous, to the point of rendering the planet uninhabitable if it all was let through. By increasing the cutoff frequency, more and more radiation is reflected away and the planetary surface cools down. This also has the effect of cutting off the lower frequencies, so the planet "daylight" is a dark violet-indigo.A smaller mirror would make the Sun grow ever more luminous at sunrise and sunset, but it being lower in the sky would reduce the risks. You could perhaps have a vegetation that mostly photosynthesizes during two short periods of time, or preferentially accumulates intermediate compounds to maximize efficiency of the light phase to "digest" them during the night and day. Essentially there would be two short "days" (sunrise and sunset) and two longer "nights" (true night and indigo night)
My question is how a species, given sufficiently advanced technology - could block out all - or most - visible light to a generally earthlike planet without rendering it uninhabitable.
The only caveat is that this should be a mechanism that could be 'turned off' if the generator were disabled.
edit - as far as not wiping out all life, I'm thinking the plant life is altered to survive on UV, and the atmosphere is engineered to allow more UV through.
·OTHER ANSWER:
My question is how a species, given sufficiently advanced technology - could block out all - or most - visible light to a generally earthlike planet without rendering it uninhabitable.
The only caveat is that this should be a mechanism that could be 'turned off' if the generator were disabled.
edit - as far as not wiping out all life, I'm thinking the plant life is altered to survive on UV, and the atmosphere is engineered to allow more UV through.
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