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Q&A

Posts tagged optics

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Q&A How can Single Vision lenses slow myopia for adults too? [closed]

These WorldFamous companies advertise that their lenses can control myopia for kids, NOT adults. But none of these lenses are approved by FDA. How can they work for adults too? Essilor Stellest ...

0 answers  ·  posted 5mo ago by TextKit‭  ·  closed 5mo ago by Canina‭

Question optics
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Q&A How to Calculate Apparent Magnitude/Brightness of Planets from Within the same Solar System

I'd like to be able to determine the appearance of the night sky from an Earth-like planet, in a solar system with multiple other planets, moons, and other bodies. Here on Earth, we can directly me...

0 answers  ·  posted 2y ago by A.E. Stephenson‭  ·  last activity 2y ago by A.E. Stephenson‭

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Q&A How could the display technology of self-rewriting books work?

Oh yes, it's Artifact Time! with Best Dad and Ozen the Immovable! If you watched Hairy Plotter and the Gas Chamber of Secrets, you probably remember the scene where the Horcrux of Adolf Hitler is ...

1 answer  ·  posted 2y ago by Mephistopheles‭  ·  last activity 2y ago by Mephistopheles‭

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Q&A How can my dragons follow your movement with their eyes?

So, dragons. They're omnivores and, while they would be potentially formidable hunters, mostly scavengers. This requires them to be more sparing with their energy. Still, they fly and flight needs...

6 answers  ·  posted 2y ago by Mephistopheles‭  ·  last activity 2y ago by Mephistopheles‭

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Q&A Light-activated Expanding Chemicals

In my world, electricity has not yet been discovered, but they have somehow still managed to attain a technological advancement similar to modern times. I am currently trying to tackle the problem...

2 answers  ·  posted 3y ago by A Lambent Eye‭  ·  last activity 3y ago by A Lambent Eye‭

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Q&A Non-electric Laser

In my world, electricity has not yet been discovered, and many advancements in society progress on a purely chemical or mechanical basis. Lasers are incredibly useful and multifaceted tools, and I...

6 answers  ·  posted 3y ago by A Lambent Eye‭  ·  last activity 3y ago by A Lambent Eye‭

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Q&A Could there be a material that inverts the colours seen through it?

I had a vision of a creature that touched things, and wherever it touched, it left a mark opposite to the original colour. For example when it walked across the grass the grass had red footprints,...

11 answers  ·  posted 3y ago by A Lambent Eye‭  ·  last activity 3y ago by A Lambent Eye‭

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Q&A Beer Goggles in the Antarctic

Background A large colony lives in the Antarctic in a network of bases. They have so far evaded the dreadful worldwide plague. When they venture outside their base they don their climate-proof ...

1 answer  ·  posted 4y ago by chasly from UK‭  ·  last activity 4y ago by chasly from UK‭

Question colonization optics
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Q&A What does a solid, 1 mile diameter subterranean glass sphere look like?

There is a solid glass sphere that is 1 mile in diameter. It is completely covered in dirt and rock, except for one small room that is built adjacent to the sphere. One of the four walls of this ...

6 answers  ·  posted 4y ago by Pink Sweetener‭  ·  last activity 4y ago by Pink Sweetener‭