How Does Radio Really Work?

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Posted by Ken in Michigan on March 23, 2025 at 21:52:17:

I am a biochemist. I took one year of college physics, and so concepts like the electromagnetic spectrum, wavelength, frequency, etc. are clear to me.

So, I ask people, how does it really work, and they tell me a carrier wave is created at X frequency, and the content is overlaid on that.

WTF?

How do you create a wave vibrating at a certain frequency in the first place?

Second,how do you actually load content onto that wave? Like a voice, or video, even?

Just something I'm determined to understand. Do you know a reference that could build from my understanding to the science behind it all?



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