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

35 points

We have sigils carved into refined rocks that can simulate the universe

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3 points

All the sufficiently advanced ones, really.

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7 points

The Saturn V Rocket, The reusable Falcon rockets spacex uses(my jaw still drops watching those things land), The US NAVY’s Rail Gun(until they canceled the project in 2021), That new globe screen doohicky in Vegas.

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10 points

People in the past had a lot of weird technologies, trickery and magician stage plays. I don’t think a laser pointer would be out of the ordinary, unless you’d try to explain what it actually is. I can imagine people would just assume it’s a trick.

Now, a cutting laser… That could be interesting.

But I wonder how people in the past would react to stuff like audio and video recording and immediate playback. I always thought that is something that screams “impossible” unless you’re already familiar with it.

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2 points

Ooh, that’s a good one (recording).

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2 points
*

Audio/video technology came to mind for me too. There’s so many layers of technological development to get to even the most basic A/V displays. And even more to have something to play on it. It’s sure to amaze or terrify some people from ages past. Similarly, navigation. Through something like a smart phone, it would probably be baffling to the brightest minds of the early 20th century, let alone centuries ago

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14 points

Smart phones. The caveat being you couldn’t take one back in time and impress them because the internet and cellular network wouldn’t be there.

I remember a great answer to this somewhere and they said a solar powered 4 function calculator is the simplest thing we have today that would blow people’s minds. You really don’t even need a scientific one to achieve the effect. Apart from the obvious (quick math, LCD display, and solar power) it also uses plastic.

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3 points

You don’t need a network to make a smartphone black magic. Just taking pictures is enough, but also single player games, calculators, word processors, image editors, music players, really any non-networked application is still magic to pre-computer people.

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2 points

Well, for like a day or two then the battery dies! But yeah, it would still be impressive, I’m not saying it wouldn’t. A time traveler must always ask themselves how long they intend on visiting!

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3 points

You can bring a solar panel with you to keep it charged if you have a long visit of convincing people you’re magic planned.

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