[HomeBrew] Understanding Radio

[Richard Blackman]

There is a story about Albert Einstein trying to explain  radio.
He says: "first you have to understand telegraphy".
"Imagine that  a telegraph is like a very long cat, with it's tail in New 
York, and its head in Los Angeles. You pull the cats' tail in New York, and 
the head meows in Los Angeles".
"Now radio is exactly the same", he says, "except, there is no cat".