What are radio waves? How spaceships send messages back to the Earth through the vacuum of space?

Question

What are radio waves? How spaceships send messages back to the Earth through the vacuum of space?

Answer 1

Just a comment to Sweet0kaye; the radio waves don't have to be especially 'long.' It just turns out that, in order to create a radio wave, you need to spin a permanent magnet near a coil; the same principle as the magneto. It creates an alternative current that, when over 3,000 RPM will start to generate airborne waves.

Due to mechanical limitations, the first radio broadcastings were on waves of hundred of meters amplitude but today, we can produce the same in the millimeter range.

But ... Sweet0kaye is only 13 and I am 60 years old so, by all means, give your 10 points to her; she deserves it!

I take my hat for you, young lady! Only 13 and so intelligent and writing very handsomely.

Answer 2

Radio waves are electromagnetic waves occurring on the radio frequency portion of the electromagnetic spectrum. A common use is to transport information through the atmosphere or outer space without wires. Radio waves are distinguished from other kinds of electromagnetic waves by their wavelength, a relatively long wavelength in the electromagnetic spectrum. They use it to send and receive messages throughout the earth.

Answer 3

Geek