invisible radio waves?

Question

how is it possible to demonstrate the invisible radio waves that are traveling through the air all around us?

Answer 1

Build a simple, crystal radio.
Radio waves are in the same spectrum as microwaves, infra-red, visible light, ultra-violet, and cosmic background radiation. They are all electromagnetic waves and the -only- difference between them is their wavelength (or frequency).

Doug

Answer 2

Radio Waves are not what most people think (they compare them to sound). Radio is in fact part of the Light Spectrum and travels most of the time at the same speed of light. It belongs to the Electromagnetic Spectrum of Light.

Radio doesn’t need a medium to propagate like sound. It is just like light, and it can travel through vacuum just as good as through most solid elements.

When it hits metallic objects, like the antenna in your car, it creates a disturbance in the electrons, and produces a small electric current. This is how we listen to radio, how your laptop is wireless, and how we see pictures of Mars sent from the rovers over there.

So to detect the wave, you just need a long piece of metal, probably a wire, and attach it to a very small light bulb. In principle, the light will illuminate if you hit the antenna with enough radio waves and you create a correct circuit using that antenna (but don’t bother trying at home, you probably won’t be able to get enough electricity to power up anything without a better knowledge of how radio waves work).

Answer 3

Well the most simple way is to turn on a radio.

Answer 4

Turn on a radio.

Answer 5

Tune in your local radio station.