this post was submitted on 11 Jul 2023
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I think lasers are pretty wack when you think about them through this lens. A small, wand-like object in your hand can make light appear from seemingly nowhere. If it's powerful enough it can set things on fire or blind people. Not to mention larger ones like laser cutters or the LLD, used to destroy missiles midflight. Thats sure to blow some feudal peasant minds

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[–] [email protected] 65 points 1 year ago (3 children)

Little bots screaming 1s and 0s at each other really fast at a pitch you can't hear.

[–] [email protected] 49 points 1 year ago* (last edited 1 year ago) (2 children)

It’s not even sound, because it doesn’t vibrate air molecules. If that were the case, it wouldn’t work in space for communicating with things like GPS satellites.

They use light. Because wifi/radio/Bluetooth/etc are all just electromagnetic, which can be converted directly into light that is outside of the visible spectrum. The same way that a lightbulb works. And it only works because in higher bands most solid objects just sort of look like they’re made of glass. They don’t block those bandwidths, so the light is able to pass through them like a window. That includes things like your body. They’re just shining light directly through you.

It’s akin to your phone and router flashing Morse code at each other with invisible flashlights.

[–] dbaner 11 points 1 year ago
[–] [email protected] 2 points 1 year ago

It's even cooler than lightbulbs, though (assuming we're talking about incandescents) - you send electricity back and forth into a wire that's just the right length, and (RF) light leaks out without it getting hot!

[–] [email protected] 4 points 1 year ago

Actually decent description

[–] [email protected] 2 points 1 year ago

Haha. The bots are screaming in morse codes.