What “is” a radio signal-?

[james dixon]

I know we know how to detect a radio signal.

I know we know how to send a radio signal.

I know a radio signal can travel through a vacuum.

I know a radio signal can travel through a solid object.

But this does not tell me what a radio signal “IS”.

Anybody have a clue?

 

[Mindmaster]

I know we know how to detect a radio signal.

I know we know how to send a radio signal.

I know a radio signal can travel through a vacuum.

I know a radio signal can travel through a solid object.

But this does not tell me what a radio signal “IS”.

Anybody have a clue?

Electromagnetic radiation.

Electromagnetic radiation - Wikipedia

 

[Sunstone]

If you know everything a radio signal can do and effect, then you know a radio signal perfectly.