For example, by observing things like interference, which are typical for waves.
I think you are confusing something. Sound waves, and electromagnetic waves, are two different types of waves.
Definition of 'Electromagnetic Waves' Definition: Electromagnetic waves or EM waves are waves that are created as a result of vibrations between an electric field and a magnetic field. In other words, EM waves are composed of oscillating magnetic and electric fields.
The frequency of any wave is completely determined at its source, and doesn'tchange once the wave leaves the source.The speed of the wave depends on the characteristics of the medium throughwhich it's traveling ... of mechanical waves by the physical characteristics of themedium, and of electromagnetic waves by its electrical characteristics.
The speed calculated for such waves, which happened to be precisely the speed of light.
Electromagnetic waves
James Clerk Maxwell derived the existence of electromagnetic waves. Due to its speed (as calculated from his equations), which is the speed of light, he concluded that light is probably also an electromagnetic wave. This was confirmed later.
Radio waves ARE electromagnetic waves.
Electromagnetic waves are transferred by electromagnetic radiation.
first of all electromagnetic waves are energy waves. and we call electromagnetic waves RADIATION.
Electromagnetic waves
Electromagnetic waves.
Electromagnetic waves transfer energy.