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It would probably take me a few weeks. Why? Well, that's just about how often I use a flashlight on something thats kinda far away (typical flashlight use is from my phone on nearby objects)
I'm talking the tops of trees, the end of the street, whatever. Outdoor flashlight use.
I feel like I would notice the lag of the beam on very far targets. It would be extremely subtle, but it would be there. Like switching from 60 to 120 FPS on a game. Otherwise, how would I even know?! -
I would start to get suspicious when i see that cars passing by have weird colours because they are getting blueshifted/redshifted.
Related: https://devrant.com/rants/2419374/...
How long do you think it would take for YOU PERSONALLY (you cannot be told or informed by any other person) that light has begun to move at the speed of sound (So, everything else remains the same, but things farther away will be delayed visually. You also see things at the same rate that you hear them, so a firework 10 miles in the distance would have the visual explosion and the sound at the exact same time)
Oh, and, this is ONLY a visual effect. The internet slowing to a crawl because suddenly light is lagging would make it too obvious.
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