[JZoback]

Radio is the same "stuff" as light, just at a lower frequency.

Thanks, I never knew that.

I always thought radio signals traveled at somewhere below the speed of light.

[RadioAstronomer]

Thanks, I never knew that.

Your welcome :-) BTW, a qualifier on this. All the frequencies travel at the same speed in a vacuum. In the atmosphere (or any other medium), the different wavelengths (frequencies) have a slightly different velocity. This is why a prism works to separate the different colors (frequencies) of light. The index of refraction is slightly different due to the velocity difference.

[Dan(9698)]

>>>...Radio is the same "stuff" as light, just at a lower frequency.

Your eyes are radio recievers. The rods and cones are antennae.