how tech works recs

[iceprincess]

are there any good resources that explain how tech works? i don't understand how telephones or radios or cell phones works and i really want to understand how the hell i can call someone from all the way across the world. is there any good youtube channels or series or books that properly explain the physics behind these concepts

[LastThursday]

Fundamentally most telecommunications is based on light, electricity, computers and materials technology.  But each of those things in themselves are huge areas of physics and engineering. I'm not sure there's any one channel that covers all those things, it really depends on how much depth and technology knowledge you're after. 

For example this video covers Maxwell's Equations which are to do with electromagnetism (light):

But that might be too much information?

Anyway, any of the science channels I posted in my journal will be of interest to you (towards the bottom of that page):

I short you'll have to look around for stuff that matches the level you're interested in.

Edited February 25 by LastThursday