- #1
Nit Wit
- 4
- 0
Right, I'm new to this forum but not new to asking daft questions. So here we go.
Just Imagine I'm sat in my shed and I've got a battery hooked up to a purely resistive load with a switch between the two. In adition I've set up a tuneable antenna in close proximity.
If I turn the switch on and off dead fast I'm able to use the antenna to pick up a signal at not only the fundamental frequency but at integer multiples of the fundamental, why?
I know about the theory of Fourier analysis, I'm not interested in that, what I'm interested in where these checky little sinewaves come from when the only thing you're applying is a single square wave.
Is applying a burst of voltage to the electrons in a conductor akin to what goes on inside a guitar string when you twang it?
I've trawled the net for an answer and so far found Fourier all!
Please help it's keeping me awake thinking about it, Cheers
Just Imagine I'm sat in my shed and I've got a battery hooked up to a purely resistive load with a switch between the two. In adition I've set up a tuneable antenna in close proximity.
If I turn the switch on and off dead fast I'm able to use the antenna to pick up a signal at not only the fundamental frequency but at integer multiples of the fundamental, why?
I know about the theory of Fourier analysis, I'm not interested in that, what I'm interested in where these checky little sinewaves come from when the only thing you're applying is a single square wave.
Is applying a burst of voltage to the electrons in a conductor akin to what goes on inside a guitar string when you twang it?
I've trawled the net for an answer and so far found Fourier all!
Please help it's keeping me awake thinking about it, Cheers