It came out of nowhere.
Felix was flying through the shattered skies, enjoying the sights of the many portals, taking the occasional selfie. Then the threads of energy formed between the portals. Felix almost flew straight into one. That kind of thing never happened. And the threads multiplied and filled the air until one...
...Felix now is somewhere else entirely no idea how he got here. While flying through the wilderness the pain starts and eventually culminates with a blood-covered pebble coming out of his mouth. Which was only supposed to happen if Felix was somewhere else so far that the magic that allows his immortality couldn't reach and the only possible place like this would be another universe entirely.
An hour, he gives himself that much time and uses it, but by then Felix decides that crying isn't useful anymore no matter how much he wants to.
Instead Felix searches for civilization, since he is going to stay in this world for the foreseeable future.
"A bit, but it might be 'too complicated' instead of 'too magic'. It's not like I ran controlled trials."
"Er, the experimental confirmation? I'm not a scientist but the Neuroi war kicked them into really high gear I think."
"I guess that is what is called here, but I will check with the scientists and send them the relevant literature if necessary. And, wow, I knew there was pressure, but still."
They leave Felix's dimension.
"The church flipped from punishing science to rewarding it. Europans working with Arab and Eastern and Albish scholars relatively peacefully. Twenty years since then, knowing that new things hurt the Neuroi so much more than old ones."
"That still a lot, even - or specially so - with a threat like the Neuroi. I wonder if you might've been comparatively more advanced already, or something. Maybe the church couldn't been as bad at persecuting people if there are witches around?"
"I wouldn't know. I think most everything big is in the last couple decades, years after the Neuroi, once we were semi-organized and had half a clue how to fight them."
"I spent a year and a bit mostly helping the boffins at London University. Some of the stuff they've come up with is really interesting. You have to be a genius or something to think of this stuff without outside help."
"Yes, I confess that I would naively assume to be impossible to think so many things so fast."
"It works because they literally do thousands and thousands of experiments a day, like, a hundred thousand people working on science all at once."
"Wait, are you trying to convince me that your society's advancements aren't impressive? That would be a first."
Arguing about Ohm's Law in this unused side room!
Gren follows him there. "They'll want me back anyway."
Ooh, nerds. How unsurprising. He will say hello and introduce himself if the argument looks doesn't uninterruptible.
They seem kind of oblivious. All talking over one another in somewhat old-fashioned English, one waving around a dagger and pointing it in different directions as a visual aid.
"GENTLEMEN!"
There's dead silence.
"Your benefactor is here." Now he has their attention.
"You have written all this yourself? A ludicrous claim, I'll tell you-"
"He is a visiting scholar bearing the work of hundreds, perhaps thousands, you fool!"
While an argument starts up again in the background, the more professional looking ones come up and greet Felix.
Felix greets back. Is there anything they want to ask him or maybe Felix should offer suggestions?
They want to know about everything. The largest number of voices call for an explanation of radio.
All Felix knows is what he remembers from reading on wikipedia. Radio waves is a kind of electromagnetic radiation of lower frequency than red. One modulates the various traits of radio waves to transmit them, then the waves hit a receiver which induces an alternate current on a circuit which can they use that to decode the signal.
He probably should just make them books next time he sleeps.
Yes... Books sound like a good start.
They'll need to make a circuit. And a detector. And transmission coding/decoding protocols, and all sorts of things. How to make electricity? Wait. What kinds of tools and materials will they need to learn how to make electricity more efficiently?
Oh, Felix knows more about that. He has a powerplant back home. At any rate, here is a brief explanation on How To Produce Electricity.
Notes are taken.
What about steam power? Are they on the right track with that? What's with this thermodynamic diagram thingy?