In a vacuum, do all electronic waves have the same frequency, velocity, wavelength, or all three?
When traveling in a vacuum, electronic waves from the electromagnetic spectrum all travel at the same speed. Velocity is speed with direction, so they would all travel at the same velocity, realtively speaking. But frequency and wavelength are quite different. The thing that makes the waves different is their respective wavelengths, which in turn determines their respective frequencies. The wavelength can be as long as that of radio waves, ranging to visible light, which is right in the middle of the electromagnetic spectrum, all the way up to gamma rays, which have the shortest wavelengths of all of them. Frequency is the number of wavelengths that go by per second, which produces the standard wavelength unit, the hertz. So velocity is a "yes", while the other two, wavelngth and frequency, are a decided "no".