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pal9000itoday at 11:43 AM1 replyview on HN

Can i make an analogue version of this somehow? That would be ultra cool


Replies

aplavintoday at 8:03 PM

You mean, without a camera and a screen, out of pure physical objects? You can actually reproduce gravitational light bending quite accurately with a properly-shaped lens (some wine glasses are surprisingly close!), see eg https://www.youtube.com/watch?v=PviYbX7cUUg for a classical wine glass experiment, or https://sites.google.com/view/jeansurdej/gravitational-lense... for purpose-made lenses. It only reproduces the so-called "weak field" bending, not light that makes half a turn (coming from behind you) or more.