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submitted 4 months ago by murmelade@lemmy.ml to c/askscience@lemmy.world

Let's say the roofs are all red, how big does it have to be to be visible as a little red dot?

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[-] pennomi@lemmy.world 13 points 4 months ago

If you can shoot an incredibly bright red light, chances are you can shoot an incredibly bright radio light too.

this post was submitted on 17 Jul 2024
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