Re:How is portable AM radio possible?
by HPsquared on Wednesday March 30, 2022 @03:05PM
(#30859483)
In essence they pick up on waves. An analogous question would be, "How can a ship detect waves on the sea if it isn't anchored?" - The ship is moved up and down, and that acceleration is sensed inside the ship.
In an analogous sort of way, electromagnetic waves induce movement in the charged particles (electrons) in the antenna. They are swept up and down the antenna by the waves.
Re:How is portable AM radio possible?
by exabrial on Thursday March 31, 2022 @02:48PM
(#30870884)
In my minds eye, It seems a ship can detect motion relative to the earth... it's the earths gravity thats holding both the sea and the ship down... argh. Sorry, I'm still struggling.
In an analogous sort of way, electromagnetic waves induce movement in the charged particles (electrons) in the antenna. They are swept up and down the antenna by the waves.